caddytls: Enable ECH on the "gotten" tls.Config instead of the "getter"

No idea if this fixes #7555
Fix lint errors
2026-05-26 00:32:31 -04:00 · 2026-03-12 15:42:47 -06:00 · 2026-03-11 13:33:59 -06:00 · 2026-03-05 08:41:54 -07:00 · 2026-03-04 21:29:44 -07:00 · 2026-03-04 21:26:18 -07:00
121 changed files with 6332 additions and 1139 deletions
@@ -1,15 +1,14 @@
 # Security Policy

-The Caddy project would like to make sure that it stays on top of all practically-exploitable vulnerabilities.
+The Caddy project would like to make sure that it stays on top of all relevant and practically-exploitable vulnerabilities.


 ## Supported Versions

-| Version  | Supported |
-| -------- | ----------|
-| 2.latest | ✔️        |
-| 1.x      | :x:       |
-| < 1.x    | :x:       |
+| Version     | Supported |
+| ----------- | ----------|
+| 2.latest    | ✔️        |
+| <= 2.latest | :x:       |


 ## Acceptable Scope
@@ -18,7 +17,7 @@ A security report must demonstrate a security bug in the source code from this r

 Some security problems are the result of interplay between different components of the Web, rather than a vulnerability in the web server itself. Please only report vulnerabilities in the web server itself, as we cannot coerce the rest of the Web to be fixed (for example, we do not consider IP spoofing, BGP hijacks, or missing/misconfigured HTTP headers a vulnerability in the Caddy web server).

-Vulnerabilities caused by misconfigurations are out of scope. Yes, it is entirely possible to craft and use a configuration that is unsafe, just like with every other web server; we recommend against doing that.
+Vulnerabilities caused by misconfigurations are out of scope. Yes, it is entirely possible to craft and use a configuration that is unsafe, just like with every other web server; we recommend against doing that. Similarly, external misconfigurations are out of scope. For example, an open or forwarded port from a public network to a Caddy instance intended to serve only internal clients is not a vulnerability in Caddy.

 We do not accept reports if the steps imply or require a compromised system or third-party software, as we cannot control those. We expect that users secure their own systems and keep all their software patched. For example, if untrusted users are able to upload/write/host arbitrary files in the web root directory, it is NOT a security bug in Caddy if those files get served to clients; however, it _would_ be a valid report if a bug in Caddy's source code unintentionally gave unauthorized users the ability to upload unsafe files or delete files without relying on an unpatched system or piece of software.

@@ -26,6 +25,8 @@ Client-side exploits are out of scope. In other words, it is not a bug in Caddy

 Security bugs in code dependencies (including Go's standard library) are out of scope. Instead, if a dependency has patched a relevant security bug, please feel free to open a public issue or pull request to update that dependency in our code.

+We accept security reports and patches, but do not assign CVEs, for code that has not been released with a non-prerelease tag.
+

 ## Reporting a Vulnerability

@@ -33,6 +34,8 @@ We get a lot of difficult reports that turn out to be invalid. Clear, obvious re

 First please ensure your report falls within the accepted scope of security bugs (above).

+:warning: **YOU MUST DISCLOSE WHETHER YOU USED LLMs ("AI") IN ANY WAY.** Whether you are using AI for discovery, as part of writing the report or its replies, and/or testing or validating proofs and changes, we require you to mention the extent of it. **FAILURE TO INCLUDE A DISCLOSURE EVEN IF YOU DO NOT USE AI MAY LEAD TO IMMEDIATE DISMISSAL OF YOUR REPORT AND POTENTIAL BLOCKLISTING.** We will not waste our time chatting with bots. But if you're a human, pull up a chair and we'll drink some chocolate milk.
+
 We'll need enough information to verify the bug and make a patch. To speed things up, please include:

 - Most minimal possible config (without redactions!)
@@ -16,8 +16,8 @@ jobs:
      models: read
      contents: read
    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
-      - uses: github/ai-moderator@6bcdb2a79c2e564db8d76d7d4439d91a044c4eb6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: github/ai-moderator@81159c370785e295c97461ade67d7c33576e9319
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          spam-label: 'spam'
@@ -31,13 +31,13 @@ jobs:
          - mac
          - windows
        go:
-          - '1.25'
+          - '1.26'

        include:
        # Set the minimum Go patch version for the given Go minor
        # Usable via ${{ matrix.GO_SEMVER }}
-        - go: '1.25'
-          GO_SEMVER: '~1.25.0'
+        - go: '1.26'
+          GO_SEMVER: '~1.26.0'

        # Set some variables per OS, usable via ${{ matrix.VAR }}
        # OS_LABEL: the VM label from GitHub Actions (see https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories)
@@ -65,15 +65,15 @@ jobs:
      actions: write # to allow uploading artifacts and cache
    steps:
    - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+      uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
      with:
        egress-policy: audit

    - name: Checkout code
-      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

    - name: Install Go
-      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+      uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
      with:
        go-version: ${{ matrix.GO_SEMVER }}
        check-latest: true
@@ -120,7 +120,7 @@ jobs:
        ./caddy stop

    - name: Publish Build Artifact
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
      with:
        name: caddy_${{ runner.os }}_go${{ matrix.go }}_${{ steps.vars.outputs.short_sha }}
        path: ${{ matrix.CADDY_BIN_PATH }}
@@ -162,13 +162,13 @@ jobs:
    continue-on-error: true  # August 2020: s390x VM is down due to weather and power issues
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit
          allowed-endpoints: ci-s390x.caddyserver.com:22

      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - name: Run Tests
        run: |
          set +e
@@ -221,27 +221,27 @@ jobs:
    if: github.event.pull_request.head.repo.full_name == 'caddyserver/caddy' && github.actor != 'dependabot[bot]'
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      
-      - uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
+      - uses: goreleaser/goreleaser-action@ec59f474b9834571250b370d4735c50f8e2d1e29 # v7.0.0
        with:
          version: latest
          args: check
      - name: Install Go
-        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
        with:
-          go-version: "~1.25"
+          go-version: "~1.26"
          check-latest: true
      - name: Install xcaddy
        run: |
          go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest
          xcaddy version
-      - uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
+      - uses: goreleaser/goreleaser-action@ec59f474b9834571250b370d4735c50f8e2d1e29 # v7.0.0
        with:
          version: latest
          args: build --single-target --snapshot
@@ -36,13 +36,13 @@ jobs:
          - 'darwin'
          - 'netbsd'
        go:
-          - '1.25'
+          - '1.26'

        include:
        # Set the minimum Go patch version for the given Go minor
        # Usable via ${{ matrix.GO_SEMVER }}
-        - go: '1.25'
-          GO_SEMVER: '~1.25.0'
+        - go: '1.26'
+          GO_SEMVER: '~1.26.0'

    runs-on: ubuntu-latest
    permissions:
@@ -51,15 +51,15 @@ jobs:
    continue-on-error: true
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Install Go
-        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
        with:
          go-version: ${{ matrix.GO_SEMVER }}
          check-latest: true
@@ -45,18 +45,18 @@ jobs:

    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
        with:
-          go-version: '~1.25'
+          go-version: '~1.26'
          check-latest: true

      - name: golangci-lint
-        uses: golangci/golangci-lint-action@4afd733a84b1f43292c63897423277bb7f4313a9 # v8.0.0
+        uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9.2.0
        with:
          version: latest

@@ -73,14 +73,14 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

      - name: govulncheck
        uses: golang/govulncheck-action@b625fbe08f3bccbe446d94fbf87fcc875a4f50ee # v1.0.4
        with:
-          go-version-input: '~1.25.0'
+          go-version-input: '~1.26.0'
          check-latest: true
  
  dependency-review:
@@ -90,14 +90,14 @@ jobs:
      pull-requests: write
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

      - name: 'Checkout Repository'
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - name: 'Dependency Review'
-        uses: actions/dependency-review-action@56339e523c0409420f6c2c9a2f4292bbb3c07dd3 # v4.8.0
+        uses: actions/dependency-review-action@05fe4576374b728f0c523d6a13d64c25081e0803 # v4.8.3
        with:
          comment-summary-in-pr: on-failure
          # https://github.com/actions/dependency-review-action/issues/430#issuecomment-1468975566
@@ -28,11 +28,11 @@ jobs:
    
    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit
      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0

@@ -28,7 +28,7 @@ jobs:
    
    steps:
      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0
      # Force fetch upstream tags -- because 65 minutes
@@ -334,13 +334,13 @@ jobs:
        os: 
          - ubuntu-latest
        go: 
-          - '1.25'
+          - '1.26'

        include:
        # Set the minimum Go patch version for the given Go minor
        # Usable via ${{ matrix.GO_SEMVER }}
-        - go: '1.25'
-          GO_SEMVER: '~1.25.0'
+        - go: '1.26'
+          GO_SEMVER: '~1.26.0'

    runs-on: ${{ matrix.os }}
    # https://github.com/sigstore/cosign/issues/1258#issuecomment-1002251233
@@ -355,23 +355,23 @@ jobs:

    steps:
    - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+      uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
      with:
        egress-policy: audit

    - name: Checkout code
-      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      with:
        fetch-depth: 0

    - name: Install Go
-      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+      uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
      with:
        go-version: ${{ matrix.GO_SEMVER }}
        check-latest: true

    # Force fetch upstream tags -- because 65 minutes
-    # tl;dr: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.2.2 runs this line:
+    # tl;dr: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4.2.2 runs this line:
    #   git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +ebc278ec98bb24f2852b61fde2a9bf2e3d83818b:refs/tags/
    # which makes its own local lightweight tag, losing all the annotations in the process. Our earlier script ran:
    #   git fetch --prune --unshallow
@@ -419,7 +419,7 @@ jobs:
    - name: Cosign version
      run: cosign version
    - name: Install Syft
-      uses: anchore/sbom-action/download-syft@f8bdd1d8ac5e901a77a92f111440fdb1b593736b # main
+      uses: anchore/sbom-action/download-syft@17ae1740179002c89186b61233e0f892c3118b11 # main
    - name: Syft version
      run: syft version
    - name: Install xcaddy
@@ -428,7 +428,7 @@ jobs:
        xcaddy version
    # GoReleaser will take care of publishing those artifacts into the release
    - name: Run GoReleaser
-      uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
+      uses: goreleaser/goreleaser-action@ec59f474b9834571250b370d4735c50f8e2d1e29 # v7.0.0
      with:
        version: latest
        args: release --clean --timeout 60m
@@ -24,12 +24,12 @@ jobs:

    # See https://github.com/peter-evans/repository-dispatch
    - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+      uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
      with:
        egress-policy: audit

    - name: Trigger event on caddyserver/dist
-      uses: peter-evans/repository-dispatch@5fc4efd1a4797ddb68ffd0714a238564e4cc0e6f # v4.0.0
+      uses: peter-evans/repository-dispatch@28959ce8df70de7be546dd1250a005dd32156697 # v4.0.1
      with:
        token: ${{ secrets.REPO_DISPATCH_TOKEN }}
        repository: caddyserver/dist
@@ -37,7 +37,7 @@ jobs:
        client-payload: '{"tag": "${{ github.event.release.tag_name }}"}'

    - name: Trigger event on caddyserver/caddy-docker
-      uses: peter-evans/repository-dispatch@5fc4efd1a4797ddb68ffd0714a238564e4cc0e6f # v4.0.0
+      uses: peter-evans/repository-dispatch@28959ce8df70de7be546dd1250a005dd32156697 # v4.0.1
      with:
        token: ${{ secrets.REPO_DISPATCH_TOKEN }}
        repository: caddyserver/caddy-docker
@@ -37,12 +37,12 @@ jobs:

    steps:
      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
        with:
          egress-policy: audit

      - name: "Checkout code"
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

@@ -72,7 +72,7 @@ jobs:
      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
      # format to the repository Actions tab.
      - name: "Upload artifact"
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
        with:
          name: SARIF file
          path: results.sarif
@@ -81,6 +81,6 @@ jobs:
      # Upload the results to GitHub's code scanning dashboard (optional).
      # Commenting out will disable upload of results to your repo's Code Scanning dashboard
      - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@3599b3baa15b485a2e49ef411a7a4bb2452e7f93 # v3.29.5
+        uses: github/codeql-action/upload-sarif@89a39a4e59826350b863aa6b6252a07ad50cf83e # v3.29.5
        with:
          sarif_file: results.sarif
@@ -32,6 +32,7 @@ linters:
    - importas
    - ineffassign
    - misspell
+    - modernize
    - prealloc
    - promlinter
    - sloglint
@@ -13,7 +13,7 @@ before:
    - cp cmd/caddy/main.go caddy-build/main.go
    - /bin/sh -c 'cd ./caddy-build && go mod init caddy'
    # prepare syso files for windows embedding
-    - /bin/sh -c 'for a in amd64 arm arm64; do XCADDY_SKIP_BUILD=1 GOOS=windows GOARCH=$a xcaddy build {{.Env.TAG}}; done'
+    - /bin/sh -c 'for a in amd64 arm64; do XCADDY_SKIP_BUILD=1 GOOS=windows GOARCH=$a xcaddy build {{.Env.TAG}}; done'
    - /bin/sh -c 'mv /tmp/buildenv_*/*.syso caddy-build'
    # GoReleaser doesn't seem to offer {{.Tag}} at this stage, so we have to embed it into the env
    # so we run: TAG=$(git describe --abbrev=0) goreleaser release --rm-dist --skip-publish --skip-validate
@@ -67,6 +67,8 @@ builds:
      goarch: s390x
    - goos: windows
      goarch: riscv64
+    - goos: windows
+      goarch: arm
    - goos: freebsd
      goarch: ppc64le
    - goos: freebsd
@@ -220,6 +220,6 @@ Matthew Holt began developing Caddy in 2014 while studying computer science at B
 - _Project on X: [@caddyserver](https://x.com/caddyserver)_
 - _Author on X: [@mholt6](https://x.com/mholt6)_

-Caddy is a project of [ZeroSSL](https://zerossl.com), a Stack Holdings company.
+Caddy is a project of [ZeroSSL](https://zerossl.com), an HID Global company.

 Debian package repository hosting is graciously provided by [Cloudsmith](https://cloudsmith.com). Cloudsmith is the only fully hosted, cloud-native, universal package management solution, that enables your organization to create, store and share packages in any format, to any place, with total confidence.
@@ -47,6 +47,12 @@ import (
 	"go.uber.org/zap/zapcore"
 )

+// testCertMagicStorageOverride is a package-level test hook. Tests may set
+// this variable to provide a temporary certmagic.Storage so that cert
+// management in tests does not hit the real default storage on disk.
+// This must NOT be set in production code.
+var testCertMagicStorageOverride certmagic.Storage
+
 func init() {
 	// The hard-coded default `DefaultAdminListen` can be overridden
 	// by setting the `CADDY_ADMIN` environment variable.
@@ -633,8 +639,19 @@ func (ident *IdentityConfig) certmagicConfig(logger *zap.Logger, makeCache bool)
 		// certmagic config, although it'll be mostly useless for remote management
 		ident = new(IdentityConfig)
 	}
+	// Choose storage: prefer the package-level test override when present,
+	// otherwise use the configured DefaultStorage. Tests may set an override
+	// to divert storage into a temporary location. Otherwise, in production
+	// we use the DefaultStorage since we don't want to act as part of a
+	// cluster; this storage is for the server's local identity only.
+	var storage certmagic.Storage
+	if testCertMagicStorageOverride != nil {
+		storage = testCertMagicStorageOverride
+	} else {
+		storage = DefaultStorage
+	}
 	template := certmagic.Config{
-		Storage: DefaultStorage, // do not act as part of a cluster (this is for the server's local identity)
+		Storage: storage,
 		Logger:  logger,
 		Issuers: ident.issuers,
 	}
@@ -732,10 +749,14 @@ func stopAdminServer(srv *http.Server) error {
 	if srv == nil {
 		return fmt.Errorf("no admin server")
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	timeout := 10 * time.Second
+	ctx, cancel := context.WithTimeoutCause(context.Background(), timeout, fmt.Errorf("stopping admin server: %ds timeout", int(timeout.Seconds())))
 	defer cancel()
 	err := srv.Shutdown(ctx)
 	if err != nil {
+		if cause := context.Cause(ctx); cause != nil && errors.Is(err, context.DeadlineExceeded) {
+			err = cause
+		}
 		return fmt.Errorf("shutting down admin server: %v", err)
 	}
 	Log().Named("admin").Info("stopped previous server", zap.String("address", srv.Addr))
@@ -807,13 +828,38 @@ func (h adminHandler) serveHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}

+	// common mitigations in browser contexts
 	if strings.Contains(r.Header.Get("Upgrade"), "websocket") {
 		// I've never been able demonstrate a vulnerability myself, but apparently
 		// WebSocket connections originating from browsers aren't subject to CORS
 		// restrictions, so we'll just be on the safe side
-		h.handleError(w, r, fmt.Errorf("websocket connections aren't allowed"))
+		h.handleError(w, r, APIError{
+			HTTPStatus: http.StatusBadRequest,
+			Err:        errors.New("websocket connections aren't allowed"),
+			Message:    "WebSocket connections aren't allowed.",
+		})
 		return
 	}
+	if strings.Contains(r.Header.Get("Sec-Fetch-Mode"), "no-cors") {
+		// turns out web pages can just disable the same-origin policy (!???!?)
+		// but at least browsers let us know that's the case, holy heck
+		h.handleError(w, r, APIError{
+			HTTPStatus: http.StatusBadRequest,
+			Err:        errors.New("client attempted to make request by disabling same-origin policy using no-cors mode"),
+			Message:    "Disabling same-origin restrictions is not allowed.",
+		})
+		return
+	}
+	if r.Header.Get("Origin") == "null" {
+		// bug in Firefox in certain cross-origin situations (yikes?)
+		// (not strictly a security vuln on its own, but it's red flaggy,
+		// since it seems to manifest in cross-origin contexts)
+		h.handleError(w, r, APIError{
+			HTTPStatus: http.StatusBadRequest,
+			Err:        errors.New("invalid origin 'null'"),
+			Message:    "Buggy browser is sending null Origin header.",
+		})
+	}

 	if h.enforceHost {
 		// DNS rebinding mitigation
@@ -824,7 +870,9 @@ func (h adminHandler) serveHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}

-	if h.enforceOrigin {
+	_, hasOriginHeader := r.Header["Origin"]
+	_, hasSecHeader := r.Header["Sec-Fetch-Mode"]
+	if h.enforceOrigin || hasOriginHeader || hasSecHeader {
 		// cross-site mitigation
 		origin, err := h.checkOrigin(r)
 		if err != nil {
@@ -22,9 +22,11 @@ import (
 	"maps"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"reflect"
 	"sync"
 	"testing"
+	"time"

 	"github.com/caddyserver/certmagic"
 	"github.com/prometheus/client_golang/prometheus"
@@ -275,13 +277,12 @@ func TestAdminHandlerBuiltinRouteErrors(t *testing.T) {
 		},
 	}

-	err := replaceLocalAdminServer(cfg, Context{})
+	// Build the admin handler directly (no listener active)
+	addr, err := ParseNetworkAddress("localhost:2019")
 	if err != nil {
-		t.Fatalf("setting up admin server: %v", err)
+		t.Fatalf("Failed to parse address: %v", err)
 	}
-	defer func() {
-		stopAdminServer(localAdminServer)
-	}()
+	handler := cfg.Admin.newAdminHandler(addr, false, Context{})

 	tests := []struct {
 		name           string
@@ -314,7 +315,7 @@ func TestAdminHandlerBuiltinRouteErrors(t *testing.T) {
 			req := httptest.NewRequest(test.method, fmt.Sprintf("http://localhost:2019%s", test.path), nil)
 			rr := httptest.NewRecorder()

-			localAdminServer.Handler.ServeHTTP(rr, req)
+			handler.ServeHTTP(rr, req)

 			if rr.Code != test.expectedStatus {
 				t.Errorf("expected status %d but got %d", test.expectedStatus, rr.Code)
@@ -799,8 +800,24 @@ MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDRS0LmTwUT0iwP
 ...
 -----END PRIVATE KEY-----`)

-	testStorage := certmagic.FileStorage{Path: t.TempDir()}
-	err := testStorage.Store(context.Background(), "localhost/localhost.crt", certPEM)
+	tmpDir, err := os.MkdirTemp("", "TestManageIdentity-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	testStorage := certmagic.FileStorage{Path: tmpDir}
+	// Clean up the temp dir after the test finishes. Ensure any background
+	// certificate maintenance is stopped first to avoid RemoveAll races.
+	t.Cleanup(func() {
+		if identityCertCache != nil {
+			identityCertCache.Stop()
+			identityCertCache = nil
+		}
+		// Give goroutines a moment to exit and release file handles.
+		time.Sleep(50 * time.Millisecond)
+		_ = os.RemoveAll(tmpDir)
+	})
+
+	err = testStorage.Store(context.Background(), "localhost/localhost.crt", certPEM)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -862,7 +879,7 @@ MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDRS0LmTwUT0iwP
 						},
 					},
 				},
-				storage: &certmagic.FileStorage{Path: "testdata"},
+				storage: &testStorage,
 			},
 			checkState: func(t *testing.T, cfg *Config) {
 				if len(cfg.Admin.Identity.issuers) != 1 {
@@ -900,6 +917,13 @@ MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDRS0LmTwUT0iwP
 				identityCertCache.Stop()
 				identityCertCache = nil
 			}
+			// Ensure any cache started by manageIdentity is stopped at the end
+			defer func() {
+				if identityCertCache != nil {
+					identityCertCache.Stop()
+					identityCertCache = nil
+				}
+			}()

 			ctx := Context{
 				Context:         context.Background(),
@@ -907,6 +931,13 @@ MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDRS0LmTwUT0iwP
 				moduleInstances: make(map[string][]Module),
 			}

+			// If this test provided a FileStorage, set the package-level
+			// testCertMagicStorageOverride so certmagicConfig will use it.
+			if test.cfg != nil && test.cfg.storage != nil {
+				testCertMagicStorageOverride = test.cfg.storage
+				defer func() { testCertMagicStorageOverride = nil }()
+			}
+
 			err := manageIdentity(ctx, test.cfg)

 			if test.wantErr {
@@ -88,7 +88,7 @@ type Config struct {
 	storage      certmagic.Storage
 	eventEmitter eventEmitter

-	cancelFunc context.CancelFunc
+	cancelFunc context.CancelCauseFunc

 	// fileSystems is a dict of fileSystems that will later be loaded from and added to.
 	fileSystems FileSystems
@@ -147,8 +147,8 @@ func Load(cfgJSON []byte, forceReload bool) error {
 // the new value (if applicable; i.e. "DELETE" doesn't have an input).
 // If the resulting config is the same as the previous, no reload will
 // occur unless forceReload is true. If the config is unchanged and not
-// forcefully reloaded, then errConfigUnchanged This function is safe for
-// concurrent use.
+// forcefully reloaded, then errConfigUnchanged is returned. This function
+// is safe for concurrent use.
 // The ifMatchHeader can optionally be given a string of the format:
 //
 //	"<path> <hash>"
@@ -227,8 +227,18 @@ func changeConfig(method, path string, input []byte, ifMatchHeader string, force
 	idx := make(map[string]string)
 	err = indexConfigObjects(rawCfg[rawConfigKey], "/"+rawConfigKey, idx)
 	if err != nil {
+		if len(rawCfgJSON) > 0 {
+			var oldCfg any
+			err2 := json.Unmarshal(rawCfgJSON, &oldCfg)
+			if err2 != nil {
+				err = fmt.Errorf("%v; additionally, restoring old config: %v", err, err2)
+			}
+			rawCfg[rawConfigKey] = oldCfg
+		} else {
+			rawCfg[rawConfigKey] = nil
+		}
 		return APIError{
-			HTTPStatus: http.StatusInternalServerError,
+			HTTPStatus: http.StatusBadRequest,
 			Err:        fmt.Errorf("indexing config: %v", err),
 		}
 	}
@@ -248,6 +258,8 @@ func changeConfig(method, path string, input []byte, ifMatchHeader string, force
 				err = fmt.Errorf("%v; additionally, restoring old config: %v", err, err2)
 			}
 			rawCfg[rawConfigKey] = oldCfg
+		} else {
+			rawCfg[rawConfigKey] = nil
 		}

 		return fmt.Errorf("loading new config: %v", err)
@@ -281,14 +293,19 @@ func indexConfigObjects(ptr any, configPath string, index map[string]string) err
 	case map[string]any:
 		for k, v := range val {
 			if k == idKey {
+				var idStr string
 				switch idVal := v.(type) {
 				case string:
-					index[idVal] = configPath
+					idStr = idVal
 				case float64: // all JSON numbers decode as float64
-					index[fmt.Sprintf("%v", idVal)] = configPath
+					idStr = fmt.Sprintf("%v", idVal)
 				default:
 					return fmt.Errorf("%s: %s field must be a string or number", configPath, idKey)
 				}
+				if existingPath, ok := index[idStr]; ok {
+					return fmt.Errorf("duplicate ID '%s' found at %s and %s", idStr, existingPath, configPath)
+				}
+				index[idStr] = configPath
 				continue
 			}
 			// traverse this object property recursively
@@ -416,7 +433,7 @@ func run(newCfg *Config, start bool) (Context, error) {
 		// partially copied from provisionContext
 		if err != nil {
 			globalMetrics.configSuccess.Set(0)
-			ctx.cfg.cancelFunc()
+			ctx.cfg.cancelFunc(fmt.Errorf("configuration start error: %w", err))

 			if currentCtx.cfg != nil {
 				certmagic.Default.Storage = currentCtx.cfg.storage
@@ -492,7 +509,7 @@ func provisionContext(newCfg *Config, replaceAdminServer bool) (Context, error)
 	// cleanup occurs when we return if there
 	// was an error; if no error, it will get
 	// cleaned up on next config cycle
-	ctx, cancel := NewContext(Context{Context: context.Background(), cfg: newCfg})
+	ctx, cancelCause := NewContextWithCause(Context{Context: context.Background(), cfg: newCfg})
 	defer func() {
 		if err != nil {
 			globalMetrics.configSuccess.Set(0)
@@ -501,7 +518,7 @@ func provisionContext(newCfg *Config, replaceAdminServer bool) (Context, error)
 			// since the associated config won't be used;
 			// this will cause all modules that were newly
 			// provisioned to clean themselves up
-			cancel()
+			cancelCause(fmt.Errorf("configuration error: %w", err))

 			// also undo any other state changes we made
 			if currentCtx.cfg != nil {
@@ -509,7 +526,7 @@ func provisionContext(newCfg *Config, replaceAdminServer bool) (Context, error)
 			}
 		}
 	}()
-	newCfg.cancelFunc = cancel // clean up later
+	newCfg.cancelFunc = cancelCause // clean up later

 	// set up logging before anything bad happens
 	if newCfg.Logging == nil {
@@ -729,7 +746,7 @@ func unsyncedStop(ctx Context) {
 	}

 	// clean up all modules
-	ctx.cfg.cancelFunc()
+	ctx.cfg.cancelFunc(fmt.Errorf("stopping apps"))
 }

 // Validate loads, provisions, and validates
@@ -737,7 +754,7 @@ func unsyncedStop(ctx Context) {
 func Validate(cfg *Config) error {
 	_, err := run(cfg, false)
 	if err == nil {
-		cfg.cancelFunc() // call Cleanup on all modules
+		cfg.cancelFunc(fmt.Errorf("validation complete")) // call Cleanup on all modules
 	}
 	return err
 }
@@ -945,6 +962,34 @@ func InstanceID() (uuid.UUID, error) {
 // for example.
 var CustomVersion string

+// CustomBinaryName is an optional string that overrides the root
+// command name from the default of "caddy". This is useful for
+// downstream projects that embed Caddy but use a different binary
+// name. Shell completions and help text will use this name instead
+// of "caddy".
+//
+// Set this variable during `go build` with `-ldflags`:
+//
+//	-ldflags '-X github.com/caddyserver/caddy/v2.CustomBinaryName=my_custom_caddy'
+//
+// for example.
+var CustomBinaryName string
+
+// CustomLongDescription is an optional string that overrides the
+// long description of the root Cobra command. This is useful for
+// downstream projects that embed Caddy but want different help
+// output.
+//
+// Set this variable in an init() function of a package that is
+// imported by your main:
+//
+//	func init() {
+//	    caddy.CustomLongDescription = "My custom server based on Caddy..."
+//	}
+//
+// for example.
+var CustomLongDescription string
+
 // Version returns the Caddy version in a simple/short form, and
 // a full version string. The short form will not have spaces and
 // is intended for User-Agent strings and similar, but may be
@@ -1092,7 +1137,7 @@ type Event struct {
 }

 // NewEvent creates a new event, but does not emit the event. To emit an
-// event, call Emit() on the current instance of the caddyevents app insteaad.
+// event, call Emit() on the current instance of the caddyevents app instead.
 //
 // EXPERIMENTAL: Subject to change.
 func NewEvent(ctx Context, name string, data map[string]any) (Event, error) {
@@ -1250,10 +1295,10 @@ func getLastConfig() (file, adapter string, fn reloadFromSourceFunc) {

 // lastConfigMatches returns true if the provided source file and/or adapter
 // matches the recorded last-config. Matching rules (in priority order):
-//  1. If srcAdapter is provided and differs from the recorded adapter, no match.
-//  2. If srcFile exactly equals the recorded file, match.
-//  3. If both sides can be made absolute and equal, match.
-//  4. If basenames are equal, match.
+// 1. If srcAdapter is provided and differs from the recorded adapter, no match.
+// 2. If srcFile exactly equals the recorded file, match.
+// 3. If both sides can be made absolute and equal, match.
+// 4. If basenames are equal, match.
 func lastConfigMatches(srcFile, srcAdapter string) bool {
 	lf, la, _ := getLastConfig()

@@ -270,7 +270,7 @@ func (d *Dispenser) File() string {
 // targets are left unchanged. If all the targets are filled,
 // then true is returned.
 func (d *Dispenser) Args(targets ...*string) bool {
-	for i := 0; i < len(targets); i++ {
+	for i := range targets {
 		if !d.NextArg() {
 			return false
 		}
@@ -507,7 +507,7 @@ func (p *parser) doImport(nesting int) error {
 		// format, won't check for nesting correctness or any other error, that's what parser does.
 		if !maybeSnippet && nesting == 0 {
 			// first of the line
-			if i == 0 || isNextOnNewLine(tokensCopy[i-1], token) {
+			if i == 0 || isNextOnNewLine(tokensCopy[len(tokensCopy)-1], token) {
 				index = 0
 			} else {
 				index++
@@ -616,7 +616,7 @@ func (p *parser) doSingleImport(importFile string) ([]Token, error) {
 	if err != nil {
 		return nil, p.Errf("Failed to get absolute path of file: %s: %v", importFile, err)
 	}
-	for i := 0; i < len(importedTokens); i++ {
+	for i := range importedTokens {
 		importedTokens[i].File = filename
 	}

@@ -113,6 +113,7 @@ func parseBind(h Helper) ([]ConfigValue, error) {
 //	    issuer                        <module_name> [...]
 //	    get_certificate               <module_name> [...]
 //	    insecure_secrets_log          <log_file>
+//	    renewal_window_ratio          <ratio>
 //	}
 func parseTLS(h Helper) ([]ConfigValue, error) {
 	h.Next() // consume directive name
@@ -129,6 +130,7 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
 	var onDemand bool
 	var reusePrivateKeys bool
 	var forceAutomate bool
+	var renewalWindowRatio float64

 	// Track which DNS challenge options are set
 	var dnsOptionsSet []string
@@ -473,6 +475,20 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
 			}
 			cp.InsecureSecretsLog = h.Val()

+		case "renewal_window_ratio":
+			arg := h.RemainingArgs()
+			if len(arg) != 1 {
+				return nil, h.ArgErr()
+			}
+			ratio, err := strconv.ParseFloat(arg[0], 64)
+			if err != nil {
+				return nil, h.Errf("parsing renewal_window_ratio: %v", err)
+			}
+			if ratio <= 0 || ratio >= 1 {
+				return nil, h.Errf("renewal_window_ratio must be between 0 and 1 (exclusive)")
+			}
+			renewalWindowRatio = ratio
+
 		default:
 			return nil, h.Errf("unknown subdirective: %s", h.Val())
 		}
@@ -597,6 +613,14 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
 		})
 	}

+	// renewal window ratio
+	if renewalWindowRatio > 0 {
+		configVals = append(configVals, ConfigValue{
+			Class: "tls.renewal_window_ratio",
+			Value: renewalWindowRatio,
+		})
+	}
+
 	// if enabled, the names in the site addresses will be
 	// added to the automation policies
 	if forceAutomate {
@@ -822,7 +822,7 @@ func (st *ServerType) serversFromPairings(
 				// https://caddy.community/t/making-sense-of-auto-https-and-why-disabling-it-still-serves-https-instead-of-http/9761
 				createdTLSConnPolicies, ok := sblock.pile["tls.connection_policy"]
 				hasTLSEnabled := (ok && len(createdTLSConnPolicies) > 0) ||
-					(addr.Host != "" && srv.AutoHTTPS != nil && !slices.Contains(srv.AutoHTTPS.Skip, addr.Host))
+					(addr.Host != "" && (srv.AutoHTTPS == nil || !slices.Contains(srv.AutoHTTPS.Skip, addr.Host)))

 				// we'll need to remember if the address qualifies for auto-HTTPS, so we
 				// can add a TLS conn policy if necessary
@@ -1,9 +1,11 @@
 package httpcaddyfile

 import (
+	"encoding/json"
 	"testing"

 	"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
 )

 func TestMatcherSyntax(t *testing.T) {
@@ -209,3 +211,53 @@ func TestGlobalOptions(t *testing.T) {
 		}
 	}
 }
+
+func TestDefaultSNIWithoutHTTPS(t *testing.T) {
+	caddyfileStr := `{
+		default_sni my-sni.com
+	}
+	example.com {
+	}`
+
+	adapter := caddyfile.Adapter{
+		ServerType: ServerType{},
+	}
+
+	result, _, err := adapter.Adapt([]byte(caddyfileStr), nil)
+	if err != nil {
+		t.Fatalf("Failed to adapt Caddyfile: %v", err)
+	}
+
+	var config struct {
+		Apps struct {
+			HTTP struct {
+				Servers map[string]*caddyhttp.Server `json:"servers"`
+			} `json:"http"`
+		} `json:"apps"`
+	}
+
+	if err := json.Unmarshal(result, &config); err != nil {
+		t.Fatalf("Failed to unmarshal JSON config: %v", err)
+	}
+
+	server, ok := config.Apps.HTTP.Servers["srv0"]
+	if !ok {
+		t.Fatalf("Expected server 'srv0' to be created")
+	}
+
+	if len(server.TLSConnPolicies) == 0 {
+		t.Fatalf("Expected TLS connection policies to be generated, got none")
+	}
+
+	found := false
+	for _, policy := range server.TLSConnPolicies {
+		if policy.DefaultSNI == "my-sni.com" {
+			found = true
+			break
+		}
+	}
+
+	if !found {
+		t.Errorf("Expected default_sni 'my-sni.com' in TLS connection policies, but it was missing. Generated JSON: %s", string(result))
+	}
+}
@@ -64,7 +64,9 @@ func init() {
 	RegisterGlobalOption("preferred_chains", parseOptPreferredChains)
 	RegisterGlobalOption("persist_config", parseOptPersistConfig)
 	RegisterGlobalOption("dns", parseOptDNS)
+	RegisterGlobalOption("tls_resolvers", parseOptTLSResolvers)
 	RegisterGlobalOption("ech", parseOptECH)
+	RegisterGlobalOption("renewal_window_ratio", parseOptRenewalWindowRatio)
 }

 func parseOptTrue(d *caddyfile.Dispenser, _ any) (any, error) { return true, nil }
@@ -305,6 +307,15 @@ func parseOptSingleString(d *caddyfile.Dispenser, _ any) (any, error) {
 	return val, nil
 }

+func parseOptTLSResolvers(d *caddyfile.Dispenser, _ any) (any, error) {
+	d.Next() // consume option name
+	resolvers := d.RemainingArgs()
+	if len(resolvers) == 0 {
+		return nil, d.ArgErr()
+	}
+	return resolvers, nil
+}
+
 func parseOptDefaultBind(d *caddyfile.Dispenser, _ any) (any, error) {
 	d.Next() // consume option name

@@ -457,9 +468,8 @@ func parseOptAutoHTTPS(d *caddyfile.Dispenser, _ any) (any, error) {
 		case "disable_redirects":
 		case "disable_certs":
 		case "ignore_loaded_certs":
-		case "prefer_wildcard":
 		default:
-			return "", d.Errf("auto_https must be one of 'off', 'disable_redirects', 'disable_certs', 'ignore_loaded_certs', or 'prefer_wildcard'")
+			return "", d.Errf("auto_https must be one of 'off', 'disable_redirects', 'disable_certs', or 'ignore_loaded_certs'")
 		}
 	}
 	return val, nil
@@ -625,3 +635,22 @@ func parseOptECH(d *caddyfile.Dispenser, _ any) (any, error) {

 	return ech, nil
 }
+
+func parseOptRenewalWindowRatio(d *caddyfile.Dispenser, _ any) (any, error) {
+	d.Next() // consume option name
+	if !d.Next() {
+		return 0, d.ArgErr()
+	}
+	val := d.Val()
+	ratio, err := strconv.ParseFloat(val, 64)
+	if err != nil {
+		return 0, d.Errf("parsing renewal_window_ratio: %v", err)
+	}
+	if ratio <= 0 || ratio >= 1 {
+		return 0, d.Errf("renewal_window_ratio must be between 0 and 1 (exclusive)")
+	}
+	if d.Next() {
+		return 0, d.ArgErr()
+	}
+	return ratio, nil
+}
@@ -1,9 +1,11 @@
 package httpcaddyfile

 import (
+	"encoding/json"
 	"testing"

 	"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
+	"github.com/caddyserver/caddy/v2/modules/caddytls"
 	_ "github.com/caddyserver/caddy/v2/modules/logging"
 )

@@ -62,3 +64,105 @@ func TestGlobalLogOptionSyntax(t *testing.T) {
 		}
 	}
 }
+
+func TestGlobalResolversOption(t *testing.T) {
+	tests := []struct {
+		name            string
+		input           string
+		expectResolvers []string
+		expectError     bool
+	}{
+		{
+			name: "single resolver",
+			input: `{
+				tls_resolvers 1.1.1.1
+			}
+			example.com {
+			}`,
+			expectResolvers: []string{"1.1.1.1"},
+			expectError:     false,
+		},
+		{
+			name: "two resolvers",
+			input: `{
+				tls_resolvers 1.1.1.1 8.8.8.8
+			}
+			example.com {
+			}`,
+			expectResolvers: []string{"1.1.1.1", "8.8.8.8"},
+			expectError:     false,
+		},
+		{
+			name: "multiple resolvers",
+			input: `{
+				tls_resolvers 1.1.1.1 8.8.8.8 9.9.9.9
+			}
+			example.com {
+			}`,
+			expectResolvers: []string{"1.1.1.1", "8.8.8.8", "9.9.9.9"},
+			expectError:     false,
+		},
+		{
+			name: "no resolvers specified",
+			input: `{
+			}
+			example.com {
+			}`,
+			expectResolvers: nil,
+			expectError:     false,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			adapter := caddyfile.Adapter{
+				ServerType: ServerType{},
+			}
+
+			out, _, err := adapter.Adapt([]byte(tc.input), nil)
+
+			if (err != nil) != tc.expectError {
+				t.Errorf("error expectation failed. Expected error: %v, got: %v", tc.expectError, err)
+				return
+			}
+
+			if tc.expectError {
+				return
+			}
+
+			// Parse the output JSON to check resolvers
+			var config struct {
+				Apps struct {
+					TLS *caddytls.TLS `json:"tls"`
+				} `json:"apps"`
+			}
+
+			if err := json.Unmarshal(out, &config); err != nil {
+				t.Errorf("failed to unmarshal output: %v", err)
+				return
+			}
+
+			// Check if resolvers match expected
+			if config.Apps.TLS == nil {
+				if tc.expectResolvers != nil {
+					t.Errorf("Expected TLS config with resolvers %v, but TLS config is nil", tc.expectResolvers)
+				}
+				return
+			}
+
+			actualResolvers := config.Apps.TLS.Resolvers
+			if len(tc.expectResolvers) == 0 && len(actualResolvers) == 0 {
+				return // Both empty, ok
+			}
+			if len(actualResolvers) != len(tc.expectResolvers) {
+				t.Errorf("Expected %d resolvers, got %d. Expected: %v, got: %v", len(tc.expectResolvers), len(actualResolvers), tc.expectResolvers, actualResolvers)
+				return
+			}
+			for j, expected := range tc.expectResolvers {
+				if actualResolvers[j] != expected {
+					t.Errorf("Resolver %d mismatch. Expected: %s, got: %s", j, expected, actualResolvers[j])
+				}
+			}
+		})
+	}
+}
@@ -16,6 +16,7 @@ package httpcaddyfile

 import (
 	"slices"
+	"strconv"

 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig"
@@ -27,14 +28,16 @@ func init() {
 	RegisterGlobalOption("pki", parsePKIApp)
 }

-// parsePKIApp parses the global log option. Syntax:
+// parsePKIApp parses the global pki option. Syntax:
 //
 //	pki {
 //	    ca [<id>] {
-//	        name                  <name>
-//	        root_cn               <name>
-//	        intermediate_cn       <name>
-//	        intermediate_lifetime <duration>
+//	        name                    <name>
+//	        root_cn                 <name>
+//	        intermediate_cn         <name>
+//	        intermediate_lifetime   <duration>
+//	        maintenance_interval    <duration>
+//	        renewal_window_ratio    <ratio>
 //	        root {
 //	            cert   <path>
 //	            key    <path>
@@ -99,6 +102,26 @@ func parsePKIApp(d *caddyfile.Dispenser, existingVal any) (any, error) {
 					}
 					pkiCa.IntermediateLifetime = caddy.Duration(dur)

+				case "maintenance_interval":
+					if !d.NextArg() {
+						return nil, d.ArgErr()
+					}
+					dur, err := caddy.ParseDuration(d.Val())
+					if err != nil {
+						return nil, err
+					}
+					pkiCa.MaintenanceInterval = caddy.Duration(dur)
+
+				case "renewal_window_ratio":
+					if !d.NextArg() {
+						return nil, d.ArgErr()
+					}
+					ratio, err := strconv.ParseFloat(d.Val(), 64)
+					if err != nil || ratio <= 0 || ratio > 1 {
+						return nil, d.Errf("renewal_window_ratio must be a number in (0, 1], got %s", d.Val())
+					}
+					pkiCa.RenewalWindowRatio = ratio
+
 				case "root":
 					if pkiCa.Root == nil {
 						pkiCa.Root = new(caddypki.KeyPair)
@@ -0,0 +1,86 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package httpcaddyfile
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
+)
+
+func TestParsePKIApp_maintenanceIntervalAndRenewalWindowRatio(t *testing.T) {
+	input := `{
+		pki {
+			ca local {
+				maintenance_interval 5m
+				renewal_window_ratio 0.15
+			}
+		}
+	}
+	:8080 {
+	}
+	`
+	adapter := caddyfile.Adapter{ServerType: ServerType{}}
+	out, _, err := adapter.Adapt([]byte(input), nil)
+	if err != nil {
+		t.Fatalf("Adapt failed: %v", err)
+	}
+
+	var cfg struct {
+		Apps struct {
+			PKI struct {
+				CertificateAuthorities map[string]struct {
+					MaintenanceInterval int64   `json:"maintenance_interval,omitempty"`
+					RenewalWindowRatio  float64 `json:"renewal_window_ratio,omitempty"`
+				} `json:"certificate_authorities,omitempty"`
+			} `json:"pki,omitempty"`
+		} `json:"apps"`
+	}
+	if err := json.Unmarshal(out, &cfg); err != nil {
+		t.Fatalf("unmarshal config: %v", err)
+	}
+
+	ca, ok := cfg.Apps.PKI.CertificateAuthorities["local"]
+	if !ok {
+		t.Fatal("expected certificate_authorities.local to exist")
+	}
+	wantInterval := 5 * time.Minute.Nanoseconds()
+	if ca.MaintenanceInterval != wantInterval {
+		t.Errorf("maintenance_interval = %d, want %d (5m)", ca.MaintenanceInterval, wantInterval)
+	}
+	if ca.RenewalWindowRatio != 0.15 {
+		t.Errorf("renewal_window_ratio = %v, want 0.15", ca.RenewalWindowRatio)
+	}
+}
+
+func TestParsePKIApp_renewalWindowRatioInvalid(t *testing.T) {
+	input := `{
+		pki {
+			ca local {
+				renewal_window_ratio 1.5
+			}
+		}
+	}
+	:8080 {
+	}
+	`
+	adapter := caddyfile.Adapter{ServerType: ServerType{}}
+	_, _, err := adapter.Adapt([]byte(input), nil)
+	if err == nil {
+		t.Error("expected error for renewal_window_ratio > 1")
+	}
+}
@@ -57,6 +57,9 @@ type serverOptions struct {
 	ShouldLogCredentials  bool
 	Metrics               *caddyhttp.Metrics
 	Trace                 bool // TODO: EXPERIMENTAL
+	// If set, overrides whether QUIC listeners allow 0-RTT (early data).
+	// If nil, the default behavior is used (currently allowed).
+	Allow0RTT *bool
 }

 func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
@@ -309,6 +312,17 @@ func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
 			}
 			serverOpts.Trace = true

+		case "0rtt":
+			// only supports "off" for now
+			if !d.NextArg() {
+				return nil, d.ArgErr()
+			}
+			if d.Val() != "off" {
+				return nil, d.Errf("unsupported 0rtt argument '%s' (only 'off' is supported)", d.Val())
+			}
+			boolVal := false
+			serverOpts.Allow0RTT = &boolVal
+
 		default:
 			return nil, d.Errf("unrecognized servers option '%s'", d.Val())
 		}
@@ -373,6 +387,7 @@ func applyServerOptions(
 		server.TrustedProxiesStrict = opts.TrustedProxiesStrict
 		server.TrustedProxiesUnix = opts.TrustedProxiesUnix
 		server.Metrics = opts.Metrics
+		server.Allow0RTT = opts.Allow0RTT
 		if opts.ShouldLogCredentials {
 			if server.Logs == nil {
 				server.Logs = new(caddyhttp.ServerLogConfig)
@@ -92,26 +92,8 @@ func (st ServerType) buildTLSApp(
 		tlsApp.Automation.Policies = append(tlsApp.Automation.Policies, catchAllAP)
 	}

-	var wildcardHosts []string                        // collect all hosts that have a wildcard in them, and aren't HTTP
 	forcedAutomatedNames := make(map[string]struct{}) // explicitly configured to be automated, even if covered by a wildcard

-	for _, p := range pairings {
-		var addresses []string
-		for _, addressWithProtocols := range p.addressesWithProtocols {
-			addresses = append(addresses, addressWithProtocols.address)
-		}
-		if !listenersUseAnyPortOtherThan(addresses, httpPort) {
-			continue
-		}
-		for _, sblock := range p.serverBlocks {
-			for _, addr := range sblock.parsedKeys {
-				if strings.HasPrefix(addr.Host, "*.") {
-					wildcardHosts = append(wildcardHosts, addr.Host[2:])
-				}
-			}
-		}
-	}
-
 	for _, p := range pairings {
 		// avoid setting up TLS automation policies for a server that is HTTP-only
 		var addresses []string
@@ -135,12 +117,6 @@ func (st ServerType) buildTLSApp(
 				return nil, warnings, err
 			}

-			// make a plain copy so we can compare whether we made any changes
-			apCopy, err := newBaseAutomationPolicy(options, warnings, true)
-			if err != nil {
-				return nil, warnings, err
-			}
-
 			sblockHosts := sblock.hostsFromKeys(false)
 			if len(sblockHosts) == 0 && catchAllAP != nil {
 				ap = catchAllAP
@@ -167,6 +143,12 @@ func (st ServerType) buildTLSApp(
 				ap.KeyType = keyTypeVals[0].Value.(string)
 			}

+			if renewalWindowRatioVals, ok := sblock.pile["tls.renewal_window_ratio"]; ok {
+				ap.RenewalWindowRatio = renewalWindowRatioVals[0].Value.(float64)
+			} else if globalRenewalWindowRatio, ok := options["renewal_window_ratio"]; ok {
+				ap.RenewalWindowRatio = globalRenewalWindowRatio.(float64)
+			}
+
 			// certificate issuers
 			if issuerVals, ok := sblock.pile["tls.cert_issuer"]; ok {
 				var issuers []certmagic.Issuer
@@ -253,16 +235,6 @@ func (st ServerType) buildTLSApp(
 			hostsNotHTTP := sblock.hostsFromKeysNotHTTP(httpPort)
 			sort.Strings(hostsNotHTTP) // solely for deterministic test results

-			// if the we prefer wildcards and the AP is unchanged,
-			// then we can skip this AP because it should be covered
-			// by an AP with a wildcard
-			if slices.Contains(autoHTTPS, "prefer_wildcard") {
-				if hostsCoveredByWildcard(hostsNotHTTP, wildcardHosts) &&
-					reflect.DeepEqual(ap, apCopy) {
-					continue
-				}
-			}
-
 			// associate our new automation policy with this server block's hosts
 			ap.SubjectsRaw = hostsNotHTTP

@@ -362,6 +334,11 @@ func (st ServerType) buildTLSApp(
 		tlsApp.DNSRaw = caddyconfig.JSONModuleObject(globalDNS, "name", globalDNS.(caddy.Module).CaddyModule().ID.Name(), nil)
 	}

+	// set up "global" (to the TLS app) DNS resolvers config
+	if globalResolvers, ok := options["tls_resolvers"]; ok && globalResolvers != nil {
+		tlsApp.Resolvers = globalResolvers.([]string)
+	}
+
 	// set up ECH from Caddyfile options
 	if ech, ok := options["ech"].(*caddytls.ECH); ok {
 		tlsApp.EncryptedClientHello = ech
@@ -576,9 +553,8 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
 		if acmeIssuer.Challenges.DNS == nil {
 			acmeIssuer.Challenges.DNS = new(caddytls.DNSChallengeConfig)
 		}
-		// If global `dns` is set, do NOT set provider in issuer, just set empty dns config
-		if globalDNS == nil && acmeIssuer.Challenges.DNS.ProviderRaw == nil {
-			// Set a global DNS provider if `acme_dns` is set and `dns` is NOT set
+		if globalACMEDNS != nil && acmeIssuer.Challenges.DNS.ProviderRaw == nil {
+			// Set a global DNS provider if `acme_dns` is set
 			acmeIssuer.Challenges.DNS.ProviderRaw = caddyconfig.JSONModuleObject(globalACMEDNS, "name", globalACMEDNS.(caddy.Module).CaddyModule().ID.Name(), nil)
 		}
 	}
@@ -624,6 +600,15 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
 	if globalCertLifetime != nil && acmeIssuer.CertificateLifetime == 0 {
 		acmeIssuer.CertificateLifetime = globalCertLifetime.(caddy.Duration)
 	}
+	// apply global resolvers if DNS challenge is configured and resolvers are not already set
+	globalResolvers := options["tls_resolvers"]
+	if globalResolvers != nil && acmeIssuer.Challenges != nil && acmeIssuer.Challenges.DNS != nil {
+		// Check if DNS challenge is actually configured
+		hasDNSChallenge := globalACMEDNSok || acmeIssuer.Challenges.DNS.ProviderRaw != nil
+		if hasDNSChallenge && len(acmeIssuer.Challenges.DNS.Resolvers) == 0 {
+			acmeIssuer.Challenges.DNS.Resolvers = globalResolvers.([]string)
+		}
+	}
 	return nil
 }

@@ -641,7 +626,8 @@ func newBaseAutomationPolicy(
 	_, hasLocalCerts := options["local_certs"]
 	keyType, hasKeyType := options["key_type"]
 	ocspStapling, hasOCSPStapling := options["ocsp_stapling"]
-	hasGlobalAutomationOpts := hasIssuers || hasLocalCerts || hasKeyType || hasOCSPStapling
+	renewalWindowRatio, hasRenewalWindowRatio := options["renewal_window_ratio"]
+	hasGlobalAutomationOpts := hasIssuers || hasLocalCerts || hasKeyType || hasOCSPStapling || hasRenewalWindowRatio

 	globalACMECA := options["acme_ca"]
 	globalACMECARoot := options["acme_ca_root"]
@@ -688,6 +674,10 @@ func newBaseAutomationPolicy(
 		ap.OCSPOverrides = ocspConfig.ResponderOverrides
 	}

+	if hasRenewalWindowRatio {
+		ap.RenewalWindowRatio = renewalWindowRatio.(float64)
+	}
+
 	return ap, nil
 }

@@ -849,20 +839,3 @@ func automationPolicyHasAllPublicNames(ap *caddytls.AutomationPolicy) bool {
 func isTailscaleDomain(name string) bool {
 	return strings.HasSuffix(strings.ToLower(name), ".ts.net")
 }
-
-func hostsCoveredByWildcard(hosts []string, wildcards []string) bool {
-	if len(hosts) == 0 || len(wildcards) == 0 {
-		return false
-	}
-	for _, host := range hosts {
-		for _, wildcard := range wildcards {
-			if strings.HasPrefix(host, "*.") {
-				continue
-			}
-			if certmagic.MatchWildcard(host, "*."+wildcard) {
-				return true
-			}
-		}
-	}
-	return false
-}
@@ -136,7 +136,7 @@ func (hl HTTPLoader) LoadConfig(ctx caddy.Context) ([]byte, error) {
 }

 func attemptHttpCall(client *http.Client, request *http.Request) (*http.Response, error) {
-	resp, err := client.Do(request)
+	resp, err := client.Do(request) //nolint:gosec // no SSRF; comes from trusted config
 	if err != nil {
 		return nil, fmt.Errorf("problem calling http loader url: %v", err)
 	} else if resp.StatusCode < 200 || resp.StatusCode > 499 {
@@ -151,7 +151,7 @@ func doHttpCallWithRetries(ctx caddy.Context, client *http.Client, request *http
 	var err error
 	const maxAttempts = 10

-	for i := 0; i < maxAttempts; i++ {
+	for i := range maxAttempts {
 		resp, err = attemptHttpCall(client, request)
 		if err != nil && i < maxAttempts-1 {
 			select {
@@ -106,7 +106,7 @@ func (adminLoad) handleLoad(w http.ResponseWriter, r *http.Request) error {
 			if err != nil {
 				caddy.Log().Named("admin.api.load").Error(err.Error())
 			}
-			_, _ = w.Write(respBody)
+			_, _ = w.Write(respBody) //nolint:gosec // false positive: no XSS here
 		}
 		body = result
 	}
@@ -187,7 +187,7 @@ func (tc *Tester) initServer(rawConfig string, configType string) error {
 		req.Header.Add("Content-Type", "text/"+configType)
 	}

-	res, err := client.Do(req)
+	res, err := client.Do(req) //nolint:gosec // no SSRF because URL is hard-coded to localhost, and port comes from config
 	if err != nil {
 		tc.t.Errorf("unable to contact caddy server. %s", err)
 		return err
@@ -279,7 +279,7 @@ func validateTestPrerequisites(tc *Tester) error {
 			return err
 		}
 		tc.t.Cleanup(func() {
-			os.Remove(f.Name())
+			os.Remove(f.Name()) //nolint:gosec // false positive, filename comes from std lib, no path traversal
 		})
 		if _, err := fmt.Fprintf(f, initConfig, tc.config.AdminPort); err != nil {
 			return err
@@ -506,7 +506,7 @@ func applyHeaders(t testing.TB, req *http.Request, requestHeaders []string) {
 func (tc *Tester) AssertResponseCode(req *http.Request, expectedStatusCode int) *http.Response {
 	tc.t.Helper()

-	resp, err := tc.Client.Do(req)
+	resp, err := tc.Client.Do(req) //nolint:gosec // no SSRFs demonstrated
 	if err != nil {
 		tc.t.Fatalf("failed to call server %s", err)
 	}
@@ -1,6 +1,7 @@
 package caddytest

 import (
+	"bytes"
 	"net/http"
 	"strings"
 	"testing"
@@ -126,3 +127,118 @@ func TestLoadUnorderedJSON(t *testing.T) {
 	}
 	tester.AssertResponseCode(req, 200)
 }
+
+func TestCheckID(t *testing.T) {
+	tester := NewTester(t)
+	tester.InitServer(`{
+		"admin": {
+			"listen": "localhost:2999"
+		},
+		"apps": {
+			"http": {
+				"http_port": 9080,
+				"servers": {
+					"s_server": {
+						"@id": "s_server",
+						"listen": [
+							":9080"
+						],
+						"routes": [
+							{
+								"handle": [
+									{
+										"handler": "static_response",
+										"body": "Hello"
+									}
+								]
+							}
+						]
+					}
+				}
+			}
+		}
+	}
+	`, "json")
+	headers := []string{"Content-Type:application/json"}
+	sServer1 := []byte(`{"@id":"s_server","listen":[":9080"],"routes":[{"@id":"route1","handle":[{"handler":"static_response","body":"Hello 2"}]}]}`)
+
+	// PUT to an existing ID should fail with a 409 conflict
+	tester.AssertPutResponseBody(
+		"http://localhost:2999/id/s_server",
+		headers,
+		bytes.NewBuffer(sServer1),
+		409,
+		`{"error":"[/config/apps/http/servers/s_server] key already exists: s_server"}`+"\n")
+
+	// POST replaces the object fully
+	tester.AssertPostResponseBody(
+		"http://localhost:2999/id/s_server",
+		headers,
+		bytes.NewBuffer(sServer1),
+		200,
+		"")
+
+	// Verify the server is running the new route
+	tester.AssertGetResponse(
+		"http://localhost:9080/",
+		200,
+		"Hello 2")
+
+	// Update the existing route to ensure IDs are handled correctly when replaced
+	tester.AssertPostResponseBody(
+		"http://localhost:2999/id/s_server",
+		headers,
+		bytes.NewBuffer([]byte(`{"@id":"s_server","listen":[":9080"],"routes":[{"@id":"route1","handle":[{"handler":"static_response","body":"Hello2"}],"match":[{"path":["/route_1/*"]}]}]}`)),
+		200,
+		"")
+
+	sServer2 := []byte(`{"@id":"s_server","listen":[":9080"],"routes":[{"@id":"route1","handle":[{"handler":"static_response","body":"Hello2"}],"match":[{"path":["/route_1/*"]}]}]}`)
+
+	// Identical patch should succeed and return 200 (config is unchanged branch)
+	tester.AssertPatchResponseBody(
+		"http://localhost:2999/id/s_server",
+		headers,
+		bytes.NewBuffer(sServer2),
+		200,
+		"")
+
+	route2 := []byte(`{"@id":"route2","handle": [{"handler": "static_response","body": "route2"}],"match":[{"path":["/route_2/*"]}]}`)
+
+	// Put a new route2 object before the route1 object due to the path of /id/route1
+	// Being translated to: /config/apps/http/servers/s_server/routes/0
+	tester.AssertPutResponseBody(
+		"http://localhost:2999/id/route1",
+		headers,
+		bytes.NewBuffer(route2),
+		200,
+		"")
+
+	// Verify that the whole config looks correct, now containing both route1 and route2
+	tester.AssertGetResponse(
+		"http://localhost:2999/config/",
+		200,
+		`{"admin":{"listen":"localhost:2999"},"apps":{"http":{"http_port":9080,"servers":{"s_server":{"@id":"s_server","listen":[":9080"],"routes":[{"@id":"route2","handle":[{"body":"route2","handler":"static_response"}],"match":[{"path":["/route_2/*"]}]},{"@id":"route1","handle":[{"body":"Hello2","handler":"static_response"}],"match":[{"path":["/route_1/*"]}]}]}}}}}`+"\n")
+
+	// Try to add another copy of route2 using POST to test duplicate ID handling
+	// Since the first route2 ended up at array index 0, and we are appending to the array, the index for the new element would be 2
+	tester.AssertPostResponseBody(
+		"http://localhost:2999/id/route2",
+		headers,
+		bytes.NewBuffer(route2),
+		400,
+		`{"error":"indexing config: duplicate ID 'route2' found at /config/apps/http/servers/s_server/routes/0 and /config/apps/http/servers/s_server/routes/2"}`+"\n")
+
+	// Use PATCH to modify an existing object successfully
+	tester.AssertPatchResponseBody(
+		"http://localhost:2999/id/route1",
+		headers,
+		bytes.NewBuffer([]byte(`{"@id":"route1","handle":[{"handler":"static_response","body":"route1"}],"match":[{"path":["/route_1/*"]}]}`)),
+		200,
+		"")
+
+	// Verify the PATCH updated the server state
+	tester.AssertGetResponse(
+		"http://localhost:9080/route_1/",
+		200,
+		"route1")
+}
@@ -51,7 +51,7 @@ func TestACMEServerWithDefaults(t *testing.T) {
 		Client: &acme.Client{
 			Directory:  "https://acme.localhost:9443/acme/local/directory",
 			HTTPClient: tester.Client,
-			Logger:     slog.New(zapslog.NewHandler(logger.Core())),
+			Logger:     slog.New(zapslog.NewHandler(logger.Core(), zapslog.WithName("acmez"))),
 		},
 		ChallengeSolvers: map[string]acmez.Solver{
 			acme.ChallengeTypeHTTP01: &naiveHTTPSolver{logger: logger},
@@ -120,7 +120,7 @@ func TestACMEServerWithMismatchedChallenges(t *testing.T) {
 		Client: &acme.Client{
 			Directory:  "https://acme.localhost:9443/acme/local/directory",
 			HTTPClient: tester.Client,
-			Logger:     slog.New(zapslog.NewHandler(logger.Core())),
+			Logger:     slog.New(zapslog.NewHandler(logger.Core(), zapslog.WithName("acmez"))),
 		},
 		ChallengeSolvers: map[string]acmez.Solver{
 			acme.ChallengeTypeHTTP01: &naiveHTTPSolver{logger: logger},
@@ -127,7 +127,7 @@ func TestACMEServerAllowPolicy(t *testing.T) {
 		_, err := client.ObtainCertificateForSANs(ctx, account, certPrivateKey, []string{"not-matching.localhost"})
 		if err == nil {
 			t.Errorf("obtaining certificate for 'not-matching.localhost' domain")
-		} else if err != nil && !strings.Contains(err.Error(), "urn:ietf:params:acme:error:rejectedIdentifier") {
+		} else if !strings.Contains(err.Error(), "urn:ietf:params:acme:error:rejectedIdentifier") {
 			t.Logf("unexpected error: %v", err)
 		}
 	}
@@ -200,7 +200,7 @@ func TestACMEServerDenyPolicy(t *testing.T) {
 		_, err := client.ObtainCertificateForSANs(ctx, account, certPrivateKey, []string{"deny.localhost"})
 		if err == nil {
 			t.Errorf("obtaining certificate for 'deny.localhost' domain")
-		} else if err != nil && !strings.Contains(err.Error(), "urn:ietf:params:acme:error:rejectedIdentifier") {
+		} else if !strings.Contains(err.Error(), "urn:ietf:params:acme:error:rejectedIdentifier") {
 			t.Logf("unexpected error: %v", err)
 		}
 	}
@@ -143,3 +143,26 @@ func TestAutoHTTPRedirectsInsertedBeforeUserDefinedCatchAllWithNoExplicitHTTPSit
 	tester.AssertGetResponse("http://foo.localhost:9080/", 200, "Foo")
 	tester.AssertGetResponse("http://baz.localhost:9080/", 200, "Foo")
 }
+
+func TestAutoHTTPSRedirectSortingExactMatchOverWildcard(t *testing.T) {
+	tester := caddytest.NewTester(t)
+	tester.InitServer(`
+    {
+        skip_install_trust
+        admin localhost:2999
+        http_port     9080
+        https_port    9443
+        local_certs
+    }
+    *.localhost:10443 {
+        respond "Wildcard"
+    }
+    dev.localhost {
+        respond "Exact"
+    }
+  `, "caddyfile")
+
+	tester.AssertRedirect("http://dev.localhost:9080/", "https://dev.localhost/", http.StatusPermanentRedirect)
+
+	tester.AssertRedirect("http://foo.localhost:9080/", "https://foo.localhost:10443/", http.StatusPermanentRedirect)
+}
@@ -46,6 +46,18 @@ app.example.com {
 																		}
 																	]
 																},
+																{
+																	"handle": [
+																		{
+																			"handler": "headers",
+																			"request": {
+																				"delete": [
+																					"Remote-Email"
+																				]
+																			}
+																		}
+																	]
+																},
 																{
 																	"handle": [
 																		{
@@ -73,6 +85,18 @@ app.example.com {
 																		}
 																	]
 																},
+																{
+																	"handle": [
+																		{
+																			"handler": "headers",
+																			"request": {
+																				"delete": [
+																					"Remote-Groups"
+																				]
+																			}
+																		}
+																	]
+																},
 																{
 																	"handle": [
 																		{
@@ -100,6 +124,18 @@ app.example.com {
 																		}
 																	]
 																},
+																{
+																	"handle": [
+																		{
+																			"handler": "headers",
+																			"request": {
+																				"delete": [
+																					"Remote-Name"
+																				]
+																			}
+																		}
+																	]
+																},
 																{
 																	"handle": [
 																		{
@@ -127,6 +163,18 @@ app.example.com {
 																		}
 																	]
 																},
+																{
+																	"handle": [
+																		{
+																			"handler": "headers",
+																			"request": {
+																				"delete": [
+																					"Remote-User"
+																				]
+																			}
+																		}
+																	]
+																},
 																{
 																	"handle": [
 																		{
@@ -200,4 +248,4 @@ app.example.com {
 			}
 		}
 	}
-}
+}
@@ -0,0 +1,146 @@
+:8080
+
+forward_auth 127.0.0.1:9091 {
+	uri /
+	copy_headers X-User-Id X-User-Role
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":8080"
+					],
+					"routes": [
+						{
+							"handle": [
+								{
+									"handle_response": [
+										{
+											"match": {
+												"status_code": [
+													2
+												]
+											},
+											"routes": [
+												{
+													"handle": [
+														{
+															"handler": "vars"
+														}
+													]
+												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"X-User-Id"
+																]
+															}
+														}
+													]
+												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"set": {
+																	"X-User-Id": [
+																		"{http.reverse_proxy.header.X-User-Id}"
+																	]
+																}
+															}
+														}
+													],
+													"match": [
+														{
+															"not": [
+																{
+																	"vars": {
+																		"{http.reverse_proxy.header.X-User-Id}": [
+																			""
+																		]
+																	}
+																}
+															]
+														}
+													]
+												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"X-User-Role"
+																]
+															}
+														}
+													]
+												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"set": {
+																	"X-User-Role": [
+																		"{http.reverse_proxy.header.X-User-Role}"
+																	]
+																}
+															}
+														}
+													],
+													"match": [
+														{
+															"not": [
+																{
+																	"vars": {
+																		"{http.reverse_proxy.header.X-User-Role}": [
+																			""
+																		]
+																	}
+																}
+															]
+														}
+													]
+												}
+											]
+										}
+									],
+									"handler": "reverse_proxy",
+									"headers": {
+										"request": {
+											"set": {
+												"X-Forwarded-Method": [
+													"{http.request.method}"
+												],
+												"X-Forwarded-Uri": [
+													"{http.request.uri}"
+												]
+											}
+										}
+									},
+									"rewrite": {
+										"method": "GET",
+										"uri": "/"
+									},
+									"upstreams": [
+										{
+											"dial": "127.0.0.1:9091"
+										}
+									]
+								}
+							]
+						}
+					]
+				}
+			}
+		}
+	}
+}
@@ -35,6 +35,18 @@ forward_auth localhost:9000 {
 														}
 													]
 												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"1"
+																]
+															}
+														}
+													]
+												},
 												{
 													"handle": [
 														{
@@ -62,6 +74,18 @@ forward_auth localhost:9000 {
 														}
 													]
 												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"B"
+																]
+															}
+														}
+													]
+												},
 												{
 													"handle": [
 														{
@@ -89,6 +113,18 @@ forward_auth localhost:9000 {
 														}
 													]
 												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"3"
+																]
+															}
+														}
+													]
+												},
 												{
 													"handle": [
 														{
@@ -116,6 +152,18 @@ forward_auth localhost:9000 {
 														}
 													]
 												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"D"
+																]
+															}
+														}
+													]
+												},
 												{
 													"handle": [
 														{
@@ -143,6 +191,18 @@ forward_auth localhost:9000 {
 														}
 													]
 												},
+												{
+													"handle": [
+														{
+															"handler": "headers",
+															"request": {
+																"delete": [
+																	"5"
+																]
+															}
+														}
+													]
+												},
 												{
 													"handle": [
 														{
@@ -203,4 +263,4 @@ forward_auth localhost:9000 {
 			}
 		}
 	}
-}
+}
@@ -0,0 +1,77 @@
+{
+	email test@example.com
+	dns mock
+	tls_resolvers 1.1.1.1 8.8.8.8
+	acme_dns
+}
+
+example.com {
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							},
+							{
+								"ca": "https://acme.zerossl.com/v2/DV90",
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"name": "mock"
+			},
+			"resolvers": [
+				"1.1.1.1",
+				"8.8.8.8"
+			]
+		}
+	}
+}
@@ -0,0 +1,38 @@
+{
+	tls_resolvers 1.1.1.1 8.8.8.8
+}
+
+example.com {
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"resolvers": [
+				"1.1.1.1",
+				"8.8.8.8"
+			]
+		}
+	}
+}
@@ -0,0 +1,72 @@
+{
+	email test@example.com
+	dns mock
+	tls_resolvers 1.1.1.1 8.8.8.8
+}
+
+example.com {
+	tls {
+		dns mock
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"example.com"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"name": "mock"
+										},
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"name": "mock"
+			},
+			"resolvers": [
+				"1.1.1.1",
+				"8.8.8.8"
+			]
+		}
+	}
+}
@@ -0,0 +1,98 @@
+{
+	email test@example.com
+	dns mock
+	tls_resolvers 1.1.1.1 8.8.8.8
+	acme_dns
+}
+
+example.com {
+	tls {
+		resolvers 9.9.9.9
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"example.com"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"9.9.9.9"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					},
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							},
+							{
+								"ca": "https://acme.zerossl.com/v2/DV90",
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"name": "mock"
+			},
+			"resolvers": [
+				"1.1.1.1",
+				"8.8.8.8"
+			]
+		}
+	}
+}
@@ -0,0 +1,112 @@
+{
+	email test@example.com
+	dns mock
+	tls_resolvers 1.1.1.1 8.8.8.8
+	acme_dns
+}
+
+site1.example.com {
+}
+
+site2.example.com {
+	tls {
+		resolvers 9.9.9.9 8.8.4.4
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"site1.example.com"
+									]
+								}
+							],
+							"terminal": true
+						},
+						{
+							"match": [
+								{
+									"host": [
+										"site2.example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"site2.example.com"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"9.9.9.9",
+											"8.8.4.4"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					},
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							},
+							{
+								"ca": "https://acme.zerossl.com/v2/DV90",
+								"challenges": {
+									"dns": {
+										"resolvers": [
+											"1.1.1.1",
+											"8.8.8.8"
+										]
+									}
+								},
+								"email": "test@example.com",
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"name": "mock"
+			},
+			"resolvers": [
+				"1.1.1.1",
+				"8.8.8.8"
+			]
+		}
+	}
+}
@@ -21,6 +21,7 @@
 		keepalive_interval 20s
 		keepalive_idle 20s
 		keepalive_count 10
+		0rtt off
 	}
 }

@@ -90,7 +91,8 @@ foo.com {
 						"h2",
 						"h2c",
 						"h3"
-					]
+					],
+					"allow_0rtt": false
 				}
 			}
 		}
@@ -0,0 +1,52 @@
+import testdata/issue_7518_unused_block_panic_snippets.conf
+
+example.com {
+	import snippet
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"handle": [
+								{
+									"handler": "subroute",
+									"routes": [
+										{
+											"handle": [
+												{
+													"handler": "headers",
+													"response": {
+														"set": {
+															"Reverse_proxy": [
+																"localhost:3000"
+															]
+														}
+													}
+												}
+											]
+										}
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		}
+	}
+}
@@ -1,27 +1,47 @@
 :80

-log {
+log one {
 	output file /var/log/access.log {
+		mode 0644
+		dir_mode 0755
 		roll_size 1gb
 		roll_uncompressed
+		roll_compression none
 		roll_local_time
 		roll_keep 5
 		roll_keep_for 90d
 	}
 }
+log two {
+	output file /var/log/access-2.log {
+		mode 0777
+		dir_mode from_file
+		roll_size 1gib
+		roll_compression zstd
+		roll_interval 12h
+		roll_at 00:00 06:00 12:00,18:00
+		roll_minutes 10 40 45,46
+		roll_keep 10
+		roll_keep_for 90d
+	}
+}
 ----------
 {
 	"logging": {
 		"logs": {
 			"default": {
 				"exclude": [
-					"http.log.access.log0"
+					"http.log.access.one",
+					"http.log.access.two"
 				]
 			},
-			"log0": {
+			"one": {
 				"writer": {
+					"dir_mode": "0755",
 					"filename": "/var/log/access.log",
+					"mode": "0644",
 					"output": "file",
+					"roll_compression": "none",
 					"roll_gzip": false,
 					"roll_keep": 5,
 					"roll_keep_days": 90,
@@ -29,7 +49,35 @@ log {
 					"roll_size_mb": 954
 				},
 				"include": [
-					"http.log.access.log0"
+					"http.log.access.one"
+				]
+			},
+			"two": {
+				"writer": {
+					"dir_mode": "from_file",
+					"filename": "/var/log/access-2.log",
+					"mode": "0777",
+					"output": "file",
+					"roll_at": [
+						"00:00",
+						"06:00",
+						"12:00",
+						"18:00"
+					],
+					"roll_compression": "zstd",
+					"roll_interval": 43200000000000,
+					"roll_keep": 10,
+					"roll_keep_days": 90,
+					"roll_minutes": [
+						10,
+						40,
+						45,
+						46
+					],
+					"roll_size_mb": 1024
+				},
+				"include": [
+					"http.log.access.two"
 				]
 			}
 		}
@@ -42,7 +90,7 @@ log {
 						":80"
 					],
 					"logs": {
-						"default_logger_name": "log0"
+						"default_logger_name": "two"
 					}
 				}
 			}
@@ -0,0 +1,41 @@
+{
+	renewal_window_ratio 0.1666
+}
+
+example.com {
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"renewal_window_ratio": 0.1666
+					}
+				]
+			}
+		}
+	}
+}
@@ -0,0 +1,63 @@
+{
+	renewal_window_ratio 0.1666
+}
+
+a.example.com {
+	tls {
+		renewal_window_ratio 0.25
+	}
+}
+
+b.example.com {
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"a.example.com"
+									]
+								}
+							],
+							"terminal": true
+						},
+						{
+							"match": [
+								{
+									"host": [
+										"b.example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"a.example.com"
+						],
+						"renewal_window_ratio": 0.25
+					},
+					{
+						"renewal_window_ratio": 0.1666
+					}
+				]
+			}
+		}
+	}
+}
@@ -0,0 +1,83 @@
+{
+	dns mock foo
+	acme_dns mock bar
+}
+
+localhost {
+	tls {
+		resolvers 8.8.8.8 8.8.4.4
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"localhost"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"localhost"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"argument": "bar",
+											"name": "mock"
+										},
+										"resolvers": [
+											"8.8.8.8",
+											"8.8.4.4"
+										]
+									}
+								},
+								"module": "acme"
+							}
+						]
+					},
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"argument": "bar",
+											"name": "mock"
+										}
+									}
+								},
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"argument": "foo",
+				"name": "mock"
+			}
+		}
+	}
+}
@@ -0,0 +1,206 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/caddyserver/caddy/v2/caddytest"
+)
+
+// TestForwardAuthCopyHeadersStripsClientHeaders is a regression test for the
+// header injection vulnerability in forward_auth copy_headers.
+//
+// When the auth service returns 200 OK without one of the copy_headers headers,
+// the MatchNot guard skips the Set operation. Before this fix, the original
+// client-supplied header survived unchanged into the backend request, allowing
+// privilege escalation with only a valid (non-privileged) bearer token. After
+// the fix, an unconditional delete route runs first, so the backend always
+// sees an absent header rather than the attacker-supplied value.
+func TestForwardAuthCopyHeadersStripsClientHeaders(t *testing.T) {
+	// Mock auth service: accepts any Bearer token, returns 200 OK with NO
+	// identity headers. This is the stateless JWT validator pattern that
+	// triggers the vulnerability.
+	authSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if strings.HasPrefix(r.Header.Get("Authorization"), "Bearer ") {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+		w.WriteHeader(http.StatusUnauthorized)
+	}))
+	defer authSrv.Close()
+
+	// Mock backend: records the identity headers it receives. A real application
+	// would use X-User-Id / X-User-Role to make authorization decisions.
+	type received struct{ userID, userRole string }
+	var (
+		mu   sync.Mutex
+		last received
+	)
+	backendSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		mu.Lock()
+		last = received{
+			userID:   r.Header.Get("X-User-Id"),
+			userRole: r.Header.Get("X-User-Role"),
+		}
+		mu.Unlock()
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprint(w, "ok")
+	}))
+	defer backendSrv.Close()
+
+	authAddr := strings.TrimPrefix(authSrv.URL, "http://")
+	backendAddr := strings.TrimPrefix(backendSrv.URL, "http://")
+
+	tester := caddytest.NewTester(t)
+	tester.InitServer(fmt.Sprintf(`
+	{
+		skip_install_trust
+		admin localhost:2999
+		http_port 9080
+		https_port 9443
+		grace_period 1ns
+	}
+	http://localhost:9080 {
+		forward_auth %s {
+			uri /
+			copy_headers X-User-Id X-User-Role
+		}
+		reverse_proxy %s
+	}
+	`, authAddr, backendAddr), "caddyfile")
+
+	// Case 1: no token. Auth must still reject the request even when the client
+	// includes identity headers. This confirms the auth check is not bypassed.
+	req, _ := http.NewRequest(http.MethodGet, "http://localhost:9080/", nil)
+	req.Header.Set("X-User-Id", "injected")
+	req.Header.Set("X-User-Role", "injected")
+	resp := tester.AssertResponseCode(req, http.StatusUnauthorized)
+	resp.Body.Close()
+
+	// Case 2: valid token, no injected headers. The backend should see absent
+	// identity headers (the auth service never returns them).
+	req, _ = http.NewRequest(http.MethodGet, "http://localhost:9080/", nil)
+	req.Header.Set("Authorization", "Bearer token123")
+	tester.AssertResponse(req, http.StatusOK, "ok")
+	mu.Lock()
+	gotID, gotRole := last.userID, last.userRole
+	mu.Unlock()
+	if gotID != "" {
+		t.Errorf("baseline: X-User-Id should be absent, got %q", gotID)
+	}
+	if gotRole != "" {
+		t.Errorf("baseline: X-User-Role should be absent, got %q", gotRole)
+	}
+
+	// Case 3 (the security regression): valid token plus forged identity headers.
+	// The fix must strip those values so the backend never sees them.
+	req, _ = http.NewRequest(http.MethodGet, "http://localhost:9080/", nil)
+	req.Header.Set("Authorization", "Bearer token123")
+	req.Header.Set("X-User-Id", "admin")        // forged
+	req.Header.Set("X-User-Role", "superadmin") // forged
+	tester.AssertResponse(req, http.StatusOK, "ok")
+	mu.Lock()
+	gotID, gotRole = last.userID, last.userRole
+	mu.Unlock()
+	if gotID != "" {
+		t.Errorf("injection: X-User-Id must be stripped, got %q", gotID)
+	}
+	if gotRole != "" {
+		t.Errorf("injection: X-User-Role must be stripped, got %q", gotRole)
+	}
+}
+
+// TestForwardAuthCopyHeadersAuthResponseWins verifies that when the auth
+// service does include a copy_headers header in its response, that value
+// is forwarded to the backend and takes precedence over any client-supplied
+// value for the same header.
+func TestForwardAuthCopyHeadersAuthResponseWins(t *testing.T) {
+	const wantUserID = "service-user-42"
+	const wantUserRole = "editor"
+
+	// Auth service: accepts bearer token and sets identity headers.
+	authSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if strings.HasPrefix(r.Header.Get("Authorization"), "Bearer ") {
+			w.Header().Set("X-User-Id", wantUserID)
+			w.Header().Set("X-User-Role", wantUserRole)
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+		w.WriteHeader(http.StatusUnauthorized)
+	}))
+	defer authSrv.Close()
+
+	type received struct{ userID, userRole string }
+	var (
+		mu   sync.Mutex
+		last received
+	)
+	backendSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		mu.Lock()
+		last = received{
+			userID:   r.Header.Get("X-User-Id"),
+			userRole: r.Header.Get("X-User-Role"),
+		}
+		mu.Unlock()
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprint(w, "ok")
+	}))
+	defer backendSrv.Close()
+
+	authAddr := strings.TrimPrefix(authSrv.URL, "http://")
+	backendAddr := strings.TrimPrefix(backendSrv.URL, "http://")
+
+	tester := caddytest.NewTester(t)
+	tester.InitServer(fmt.Sprintf(`
+	{
+		skip_install_trust
+		admin localhost:2999
+		http_port 9080
+		https_port 9443
+		grace_period 1ns
+	}
+	http://localhost:9080 {
+		forward_auth %s {
+			uri /
+			copy_headers X-User-Id X-User-Role
+		}
+		reverse_proxy %s
+	}
+	`, authAddr, backendAddr), "caddyfile")
+
+	// The client sends forged headers; the auth service overrides them with
+	// its own values. The backend must receive the auth service values.
+	req, _ := http.NewRequest(http.MethodGet, "http://localhost:9080/", nil)
+	req.Header.Set("Authorization", "Bearer token123")
+	req.Header.Set("X-User-Id", "forged-id")   // must be overwritten
+	req.Header.Set("X-User-Role", "forged-role") // must be overwritten
+	tester.AssertResponse(req, http.StatusOK, "ok")
+
+	mu.Lock()
+	gotID, gotRole := last.userID, last.userRole
+	mu.Unlock()
+	if gotID != wantUserID {
+		t.Errorf("X-User-Id: want %q, got %q", wantUserID, gotID)
+	}
+	if gotRole != wantUserRole {
+		t.Errorf("X-User-Role: want %q, got %q", wantUserRole, gotRole)
+	}
+}
@@ -3,7 +3,7 @@ package integration
 import (
 	"bytes"
 	"fmt"
-	"math/rand"
+	"math/rand/v2"
 	"net"
 	"net/http"
 	"strings"
@@ -54,7 +54,7 @@ func TestHTTPRedirectWrapperWithLargeUpload(t *testing.T) {
 	const uploadSize = (1024 * 1024) + 1 // 1 MB + 1 byte
 	// 1 more than an MB
 	body := make([]byte, uploadSize)
-	rand.New(rand.NewSource(0)).Read(body)
+	rand.NewChaCha8([32]byte{}).Read(body)

 	tester := setupListenerWrapperTest(t, func(writer http.ResponseWriter, request *http.Request) {
 		buf := new(bytes.Buffer)
@@ -53,7 +53,7 @@ func TestLeafCertLifetimeLessThanIntermediate(t *testing.T) {
        }
      }
    }
-	`, "json", "certificate lifetime (168h0m0s) should be less than intermediate certificate lifetime (168h0m0s)")
+  `, "json", "should be less than intermediate certificate lifetime")
 }

 func TestIntermediateLifetimeLessThanRoot(t *testing.T) {
@@ -103,5 +103,5 @@ func TestIntermediateLifetimeLessThanRoot(t *testing.T) {
        }
      }
    }
-	`, "json", "intermediate certificate lifetime must be less than root certificate lifetime (86400h0m0s)")
+  `, "json", "intermediate certificate lifetime must be less than actual root certificate lifetime")
 }
@@ -0,0 +1,595 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Integration tests for Caddy's PROXY protocol support, covering two distinct
+// roles that Caddy can play:
+//
+//  1. As a PROXY protocol *sender* (reverse proxy outbound transport):
+//     Caddy receives an inbound request from a test client and the
+//     reverse_proxy handler forwards it to an upstream with a PROXY protocol
+//     header (v1 or v2) prepended to the connection.  A lightweight backend
+//     built with go-proxyproto validates that the header was received and
+//     carries the correct client address.
+//
+//     Transport versions tested:
+//   - "1.1"  -> plain HTTP/1.1 to the upstream
+//   - "h2c"  -> HTTP/2 cleartext (h2c) to the upstream (regression for #7529)
+//   - "2"    -> HTTP/2 over TLS (h2) to the upstream
+//
+//     For each transport version both PROXY protocol v1 and v2 are exercised.
+//
+//     HTTP/3 (h3) is not included because it uses QUIC/UDP and therefore
+//     bypasses the TCP-level dialContext that injects PROXY protocol headers;
+//     there is no meaningful h3 + proxy protocol sender combination to test.
+//
+//  2. As a PROXY protocol *receiver* (server-side listener wrapper):
+//     A raw TCP client dials Caddy directly, injects a PROXY v2 header
+//     spoofing a source address, and sends a normal HTTP/1.1 request.  The
+//     Caddy server is configured with the proxy_protocol listener wrapper and
+//     is expected to surface the spoofed address via the
+//     {http.request.remote.host} placeholder.
+
+package integration
+
+import (
+	"crypto/tls"
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"slices"
+	"strings"
+	"sync"
+	"testing"
+
+	goproxy "github.com/pires/go-proxyproto"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/h2c"
+
+	"github.com/caddyserver/caddy/v2/caddytest"
+)
+
+// proxyProtoBackend is a minimal HTTP server that sits behind a
+// go-proxyproto listener and records the source address that was
+// delivered in the PROXY header for each request.
+type proxyProtoBackend struct {
+	mu          sync.Mutex
+	headerAddrs []string // host:port strings extracted from each PROXY header
+
+	ln  net.Listener
+	srv *http.Server
+}
+
+// newProxyProtoBackend starts a TCP listener wrapped with go-proxyproto on a
+// random local port and serves requests with a simple "OK" body.  The PROXY
+// header source addresses are accumulated in headerAddrs so tests can
+// inspect them.
+func newProxyProtoBackend(t *testing.T) *proxyProtoBackend {
+	t.Helper()
+
+	b := &proxyProtoBackend{}
+
+	rawLn, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("backend: listen: %v", err)
+	}
+
+	// Wrap with go-proxyproto so the PROXY header is stripped and parsed
+	// before the HTTP server sees the connection.  We use REQUIRE so that a
+	// missing header returns an error instead of silently passing through.
+	pLn := &goproxy.Listener{
+		Listener: rawLn,
+		Policy: func(_ net.Addr) (goproxy.Policy, error) {
+			return goproxy.REQUIRE, nil
+		},
+	}
+	b.ln = pLn
+
+	// Wrap the handler with h2c support so the backend can speak HTTP/2
+	// cleartext (h2c) as well as plain HTTP/1.1.  Without this, Caddy's
+	// reverse proxy would receive a 'frame too large' error when the
+	// upstream transport is configured to use h2c.
+	h2Server := &http2.Server{}
+	handlerFn := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// go-proxyproto has already updated the net.Conn's remote
+		// address to the value from the PROXY header; the HTTP server
+		// surfaces it in r.RemoteAddr.
+		b.mu.Lock()
+		b.headerAddrs = append(b.headerAddrs, r.RemoteAddr)
+		b.mu.Unlock()
+		w.WriteHeader(http.StatusOK)
+		_, _ = fmt.Fprint(w, "OK")
+	})
+
+	b.srv = &http.Server{
+		Handler: h2c.NewHandler(handlerFn, h2Server),
+	}
+
+	go b.srv.Serve(pLn) //nolint:errcheck
+	t.Cleanup(func() {
+		_ = b.srv.Close()
+		_ = rawLn.Close()
+	})
+
+	return b
+}
+
+// addr returns the listening address (host:port) of the backend.
+func (b *proxyProtoBackend) addr() string {
+	return b.ln.Addr().String()
+}
+
+// recordedAddrs returns a snapshot of all PROXY-header source addresses seen
+// so far.
+func (b *proxyProtoBackend) recordedAddrs() []string {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	cp := make([]string, len(b.headerAddrs))
+	copy(cp, b.headerAddrs)
+	return cp
+}
+
+// tlsProxyProtoBackend is a TLS-enabled backend that sits behind a
+// go-proxyproto listener.  The PROXY header is stripped before the TLS
+// handshake so the layer order on a connection is:
+//
+//	raw TCP → go-proxyproto (strips PROXY header) → TLS handshake → HTTP/2
+type tlsProxyProtoBackend struct {
+	mu          sync.Mutex
+	headerAddrs []string
+
+	srv *httptest.Server
+}
+
+// newTLSProxyProtoBackend starts a TLS listener that first reads and strips
+// PROXY protocol headers (go-proxyproto, REQUIRE policy) and then performs a
+// TLS handshake.  The backend speaks HTTP/2 over TLS (h2).
+//
+// The certificate is the standard self-signed certificate generated by
+// httptest.Server; the Caddy transport must be configured with
+// insecure_skip_verify: true to trust it.
+func newTLSProxyProtoBackend(t *testing.T) *tlsProxyProtoBackend {
+	t.Helper()
+
+	b := &tlsProxyProtoBackend{}
+
+	handlerFn := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b.mu.Lock()
+		b.headerAddrs = append(b.headerAddrs, r.RemoteAddr)
+		b.mu.Unlock()
+		w.WriteHeader(http.StatusOK)
+		_, _ = fmt.Fprint(w, "OK")
+	})
+
+	rawLn, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("tlsBackend: listen: %v", err)
+	}
+
+	// Wrap with go-proxyproto so the PROXY header is consumed before TLS.
+	pLn := &goproxy.Listener{
+		Listener: rawLn,
+		Policy: func(_ net.Addr) (goproxy.Policy, error) {
+			return goproxy.REQUIRE, nil
+		},
+	}
+
+	// httptest.NewUnstartedServer lets us replace the listener before
+	// calling StartTLS(), which wraps our proxyproto listener with
+	// tls.NewListener.  This gives us the right layer order.
+	b.srv = httptest.NewUnstartedServer(handlerFn)
+	b.srv.Listener = pLn
+
+	// StartTLS enables HTTP/2 on the server automatically.
+	b.srv.StartTLS()
+
+	t.Cleanup(func() {
+		b.srv.Close()
+	})
+
+	return b
+}
+
+// addr returns the listening address (host:port) of the TLS backend.
+func (b *tlsProxyProtoBackend) addr() string {
+	return b.srv.Listener.Addr().String()
+}
+
+// tlsConfig returns the *tls.Config used by the backend server.
+// Tests can use it to verify cert details if needed.
+func (b *tlsProxyProtoBackend) tlsConfig() *tls.Config {
+	return b.srv.TLS
+}
+
+// recordedAddrs returns a snapshot of all PROXY-header source addresses.
+func (b *tlsProxyProtoBackend) recordedAddrs() []string {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	cp := make([]string, len(b.headerAddrs))
+	copy(cp, b.headerAddrs)
+	return cp
+}
+
+// proxyProtoTLSConfig builds a Caddy JSON configuration that proxies to a TLS
+// upstream with PROXY protocol.  The transport uses insecure_skip_verify so
+// the self-signed certificate generated by httptest.Server is accepted.
+func proxyProtoTLSConfig(listenPort int, backendAddr, ppVersion string, transportVersions []string) string {
+	versionsJSON, _ := json.Marshal(transportVersions)
+	return fmt.Sprintf(`{
+		"admin": {
+			"listen": "localhost:2999"
+		},
+		"apps": {
+			"pki": {
+				"certificate_authorities": {
+					"local": {
+						"install_trust": false
+					}
+				}
+			},
+			"http": {
+				"grace_period": 1,
+				"servers": {
+					"proxy": {
+						"listen": [":%d"],
+						"automatic_https": {
+							"disable": true
+						},
+						"routes": [
+							{
+								"handle": [
+									{
+										"handler": "reverse_proxy",
+										"upstreams": [{"dial": "%s"}],
+										"transport": {
+											"protocol": "http",
+											"proxy_protocol": "%s",
+											"versions": %s,
+											"tls": {
+												"insecure_skip_verify": true
+											}
+										}
+									}
+								]
+							}
+						]
+					}
+				}
+			}
+		}
+	}`, listenPort, backendAddr, ppVersion, string(versionsJSON))
+}
+
+// testTLSProxyProtocolMatrix is the shared implementation for TLS-based proxy
+// protocol tests.  It mirrors testProxyProtocolMatrix but uses a TLS backend.
+func testTLSProxyProtocolMatrix(t *testing.T, ppVersion string, transportVersions []string, numRequests int) {
+	t.Helper()
+
+	backend := newTLSProxyProtoBackend(t)
+	listenPort := freePort(t)
+
+	tester := caddytest.NewTester(t)
+	tester.WithDefaultOverrides(caddytest.Config{
+		AdminPort: 2999,
+	})
+	cfg := proxyProtoTLSConfig(listenPort, backend.addr(), ppVersion, transportVersions)
+	tester.InitServer(cfg, "json")
+
+	proxyURL := fmt.Sprintf("http://127.0.0.1:%d/", listenPort)
+
+	for i := 0; i < numRequests; i++ {
+		resp, err := tester.Client.Get(proxyURL)
+		if err != nil {
+			t.Fatalf("request %d/%d: GET %s: %v", i+1, numRequests, proxyURL, err)
+		}
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			t.Errorf("request %d/%d: expected status 200, got %d", i+1, numRequests, resp.StatusCode)
+		}
+	}
+
+	addrs := backend.recordedAddrs()
+	if len(addrs) == 0 {
+		t.Fatalf("backend recorded no PROXY protocol addresses (expected at least 1)")
+	}
+
+	for i, addr := range addrs {
+		host, _, err := net.SplitHostPort(addr)
+		if err != nil {
+			t.Errorf("addr[%d] %q: SplitHostPort: %v", i, addr, err)
+			continue
+		}
+		if host != "127.0.0.1" {
+			t.Errorf("addr[%d]: expected source 127.0.0.1, got %q", i, host)
+		}
+	}
+}
+
+// proxyProtoConfig builds a Caddy JSON configuration that:
+//   - listens on listenPort for inbound HTTP requests
+//   - proxies them to backendAddr with PROXY protocol ppVersion ("v1"/"v2")
+//   - uses the given transport versions (e.g. ["1.1"] or ["h2c"])
+func proxyProtoConfig(listenPort int, backendAddr, ppVersion string, transportVersions []string) string {
+	versionsJSON, _ := json.Marshal(transportVersions)
+	return fmt.Sprintf(`{
+		"admin": {
+			"listen": "localhost:2999"
+		},
+		"apps": {
+			"pki": {
+				"certificate_authorities": {
+					"local": {
+						"install_trust": false
+					}
+				}
+			},
+			"http": {
+				"grace_period": 1,
+				"servers": {
+					"proxy": {
+						"listen": [":%d"],
+						"automatic_https": {
+							"disable": true
+						},
+						"routes": [
+							{
+								"handle": [
+									{
+										"handler": "reverse_proxy",
+										"upstreams": [{"dial": "%s"}],
+										"transport": {
+											"protocol": "http",
+											"proxy_protocol": "%s",
+											"versions": %s
+										}
+									}
+								]
+							}
+						]
+					}
+				}
+			}
+		}
+	}`, listenPort, backendAddr, ppVersion, string(versionsJSON))
+}
+
+// freePort returns a free local TCP port by binding briefly and releasing it.
+func freePort(t *testing.T) int {
+	t.Helper()
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("freePort: %v", err)
+	}
+	port := ln.Addr().(*net.TCPAddr).Port
+	_ = ln.Close()
+	return port
+}
+
+// TestProxyProtocolV1WithH1 verifies that PROXY protocol v1 headers are sent
+// correctly when the transport uses HTTP/1.1 to the upstream.
+func TestProxyProtocolV1WithH1(t *testing.T) {
+	testProxyProtocolMatrix(t, "v1", []string{"1.1"}, 1)
+}
+
+// TestProxyProtocolV2WithH1 verifies that PROXY protocol v2 headers are sent
+// correctly when the transport uses HTTP/1.1 to the upstream.
+func TestProxyProtocolV2WithH1(t *testing.T) {
+	testProxyProtocolMatrix(t, "v2", []string{"1.1"}, 1)
+}
+
+// TestProxyProtocolV1WithH2C verifies that PROXY protocol v1 headers are sent
+// correctly when the transport uses h2c (HTTP/2 cleartext) to the upstream.
+func TestProxyProtocolV1WithH2C(t *testing.T) {
+	testProxyProtocolMatrix(t, "v1", []string{"h2c"}, 1)
+}
+
+// TestProxyProtocolV2WithH2C verifies that PROXY protocol v2 headers are sent
+// correctly when the transport uses h2c (HTTP/2 cleartext) to the upstream.
+// This is the primary regression test for github.com/caddyserver/caddy/issues/7529:
+// before the fix, the h2 transport opened a new TCP connection per request
+// (because req.URL.Host was mangled differently for each request due to the
+// varying client port), which caused file-descriptor exhaustion under load.
+func TestProxyProtocolV2WithH2C(t *testing.T) {
+	testProxyProtocolMatrix(t, "v2", []string{"h2c"}, 1)
+}
+
+// TestProxyProtocolV2WithH2CMultipleRequests sends several sequential requests
+// through the h2c + PROXY-protocol path and confirms that:
+//  1. Every request receives a 200 response (no connection exhaustion).
+//  2. The backend received at least one PROXY header (connection was reused).
+//
+// This is the core regression guard for issue #7529: without the fix, a new
+// TCP connection was opened per request, quickly exhausting file descriptors.
+func TestProxyProtocolV2WithH2CMultipleRequests(t *testing.T) {
+	testProxyProtocolMatrix(t, "v2", []string{"h2c"}, 5)
+}
+
+// TestProxyProtocolV1WithH2 verifies that PROXY protocol v1 headers are sent
+// correctly when the transport uses HTTP/2 over TLS (h2) to the upstream.
+func TestProxyProtocolV1WithH2(t *testing.T) {
+	testTLSProxyProtocolMatrix(t, "v1", []string{"2"}, 1)
+}
+
+// TestProxyProtocolV2WithH2 verifies that PROXY protocol v2 headers are sent
+// correctly when the transport uses HTTP/2 over TLS (h2) to the upstream.
+func TestProxyProtocolV2WithH2(t *testing.T) {
+	testTLSProxyProtocolMatrix(t, "v2", []string{"2"}, 1)
+}
+
+// TestProxyProtocolServerAndProxy is an end-to-end matrix test that exercises
+// all combinations of PROXY protocol version x transport version.
+func TestProxyProtocolServerAndProxy(t *testing.T) {
+	plainTests := []struct {
+		name              string
+		ppVersion         string
+		transportVersions []string
+		numRequests       int
+	}{
+		{"h1-v1", "v1", []string{"1.1"}, 3},
+		{"h1-v2", "v2", []string{"1.1"}, 3},
+		{"h2c-v1", "v1", []string{"h2c"}, 3},
+		{"h2c-v2", "v2", []string{"h2c"}, 3},
+	}
+	for _, tc := range plainTests {
+		t.Run(tc.name, func(t *testing.T) {
+			testProxyProtocolMatrix(t, tc.ppVersion, tc.transportVersions, tc.numRequests)
+		})
+	}
+
+	tlsTests := []struct {
+		name              string
+		ppVersion         string
+		transportVersions []string
+		numRequests       int
+	}{
+		{"h2-v1", "v1", []string{"2"}, 3},
+		{"h2-v2", "v2", []string{"2"}, 3},
+	}
+	for _, tc := range tlsTests {
+		t.Run(tc.name, func(t *testing.T) {
+			testTLSProxyProtocolMatrix(t, tc.ppVersion, tc.transportVersions, tc.numRequests)
+		})
+	}
+}
+
+// testProxyProtocolMatrix is the shared implementation for the proxy protocol
+// tests.  It:
+//  1. Starts a go-proxyproto-wrapped backend.
+//  2. Configures Caddy as a reverse proxy with the given PROXY protocol
+//     version and transport versions.
+//  3. Sends numRequests GET requests through Caddy and asserts 200 OK each time.
+//  4. Asserts the backend recorded at least one PROXY header whose source host
+//     is 127.0.0.1 (the loopback address used by the test client).
+func testProxyProtocolMatrix(t *testing.T, ppVersion string, transportVersions []string, numRequests int) {
+	t.Helper()
+
+	backend := newProxyProtoBackend(t)
+	listenPort := freePort(t)
+
+	tester := caddytest.NewTester(t)
+	tester.WithDefaultOverrides(caddytest.Config{
+		AdminPort: 2999,
+	})
+	cfg := proxyProtoConfig(listenPort, backend.addr(), ppVersion, transportVersions)
+	tester.InitServer(cfg, "json")
+
+	// If the test is h2c-only (no "1.1" in versions), reconfigure the test
+	// client transport to use unencrypted HTTP/2 so we actually exercise the
+	// h2c code path through Caddy.
+	if slices.Contains(transportVersions, "h2c") && !slices.Contains(transportVersions, "1.1") {
+		tr, ok := tester.Client.Transport.(*http.Transport)
+		if ok {
+			tr.Protocols = new(http.Protocols)
+			tr.Protocols.SetHTTP1(false)
+			tr.Protocols.SetUnencryptedHTTP2(true)
+		}
+	}
+
+	proxyURL := fmt.Sprintf("http://127.0.0.1:%d/", listenPort)
+
+	for i := 0; i < numRequests; i++ {
+		resp, err := tester.Client.Get(proxyURL)
+		if err != nil {
+			t.Fatalf("request %d/%d: GET %s: %v", i+1, numRequests, proxyURL, err)
+		}
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			t.Errorf("request %d/%d: expected status 200, got %d", i+1, numRequests, resp.StatusCode)
+		}
+	}
+
+	// The backend must have seen at least one PROXY header.  For h1, there is
+	// one per request; for h2c, requests share the same connection so only one
+	// header is written at connection establishment.
+	addrs := backend.recordedAddrs()
+	if len(addrs) == 0 {
+		t.Fatalf("backend recorded no PROXY protocol addresses (expected at least 1)")
+	}
+
+	// Every PROXY-decoded source address must be the loopback address since
+	// the test client always connects from 127.0.0.1.
+	for i, addr := range addrs {
+		host, _, err := net.SplitHostPort(addr)
+		if err != nil {
+			t.Errorf("addr[%d] %q: SplitHostPort: %v", i, addr, err)
+			continue
+		}
+		if host != "127.0.0.1" {
+			t.Errorf("addr[%d]: expected source 127.0.0.1, got %q", i, host)
+		}
+	}
+}
+
+// TestProxyProtocolListenerWrapper verifies that Caddy's
+// caddy.listeners.proxy_protocol listener wrapper can successfully parse
+// incoming PROXY protocol headers.
+//
+// The test dials Caddy's listening port directly, injects a raw PROXY v2
+// header spoofing source address 10.0.0.1:1234, then sends a normal
+// HTTP/1.1 GET request.  The Caddy server is configured to echo back the
+// remote address ({http.request.remote.host}).  The test asserts that the
+// echoed address is the spoofed 10.0.0.1.
+func TestProxyProtocolListenerWrapper(t *testing.T) {
+	tester := caddytest.NewTester(t)
+	tester.InitServer(`{
+		skip_install_trust
+		admin localhost:2999
+		http_port 9080
+		https_port 9443
+		grace_period 1ns
+		servers :9080 {
+			listener_wrappers {
+				proxy_protocol {
+					timeout 5s
+					allow 127.0.0.0/8
+				}
+			}
+		}
+	}
+	http://localhost:9080 {
+		respond "{http.request.remote.host}"
+	}`, "caddyfile")
+
+	// Dial the Caddy listener directly and inject a PROXY v2 header that
+	// claims the connection originates from 10.0.0.1:1234.
+	conn, err := net.Dial("tcp", "127.0.0.1:9080")
+	if err != nil {
+		t.Fatalf("dial: %v", err)
+	}
+	defer conn.Close()
+
+	spoofedSrc := &net.TCPAddr{IP: net.ParseIP("10.0.0.1"), Port: 1234}
+	spoofedDst := &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 9080}
+	hdr := goproxy.HeaderProxyFromAddrs(2, spoofedSrc, spoofedDst)
+	if _, err := hdr.WriteTo(conn); err != nil {
+		t.Fatalf("write proxy header: %v", err)
+	}
+
+	// Write a minimal HTTP/1.1 GET request.
+	_, err = fmt.Fprintf(conn,
+		"GET / HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\n\r\n")
+	if err != nil {
+		t.Fatalf("write HTTP request: %v", err)
+	}
+
+	// Read the raw response and look for the spoofed address in the body.
+	buf := make([]byte, 4096)
+	n, _ := conn.Read(buf)
+	raw := string(buf[:n])
+
+	if !strings.Contains(raw, "10.0.0.1") {
+		t.Errorf("expected spoofed address 10.0.0.1 in response body; full response:\n%s", raw)
+	}
+}
@@ -8,7 +8,6 @@ import (
 	"runtime"
 	"strings"
 	"testing"
-	"time"

 	"github.com/caddyserver/caddy/v2/caddytest"
 )
@@ -327,6 +326,41 @@ func TestReverseProxyWithPlaceholderTCPDialAddress(t *testing.T) {
 }

 func TestReverseProxyHealthCheck(t *testing.T) {
+	// Start lightweight backend servers so they're ready before Caddy's
+	// active health checker runs; this avoids a startup race where the
+	// health checker probes backends that haven't yet begun accepting
+	// connections and marks them unhealthy.
+	//
+	// This mirrors how health checks are typically used in practice (to a separate
+	// backend service) and avoids probing the same Caddy instance while it's still
+	// provisioning and not ready to accept connections.
+
+	// backend server that responds to proxied requests
+	helloSrv := &http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			_, _ = w.Write([]byte("Hello, World!"))
+		}),
+	}
+	ln0, err := net.Listen("tcp", "127.0.0.1:2020")
+	if err != nil {
+		t.Fatalf("failed to listen on 127.0.0.1:2020: %v", err)
+	}
+	go helloSrv.Serve(ln0)
+	t.Cleanup(func() { helloSrv.Close(); ln0.Close() })
+
+	// backend server that serves health checks
+	healthSrv := &http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			_, _ = w.Write([]byte("ok"))
+		}),
+	}
+	ln1, err := net.Listen("tcp", "127.0.0.1:2021")
+	if err != nil {
+		t.Fatalf("failed to listen on 127.0.0.1:2021: %v", err)
+	}
+	go healthSrv.Serve(ln1)
+	t.Cleanup(func() { healthSrv.Close(); ln1.Close() })
+
 	tester := caddytest.NewTester(t)
 	tester.InitServer(`
 	{
@@ -336,12 +370,6 @@ func TestReverseProxyHealthCheck(t *testing.T) {
 		https_port    9443
 		grace_period 1ns
 	}
-	http://localhost:2020 {
-		respond "Hello, World!"
-	}
-	http://localhost:2021 {
-		respond "ok"
-	}
 	http://localhost:9080 {
 		reverse_proxy {
 			to localhost:2020
@@ -355,8 +383,68 @@ func TestReverseProxyHealthCheck(t *testing.T) {
 		}
 	}
 	`, "caddyfile")
+	tester.AssertGetResponse("http://localhost:9080/", 200, "Hello, World!")
+}

-	time.Sleep(100 * time.Millisecond) // TODO: for some reason this test seems particularly flaky, getting 503 when it should be 200, unless we wait
+// TestReverseProxyHealthCheckPortUsed verifies that health_port is actually
+// used for active health checks and not the upstream's main port. This is a
+// regression test for https://github.com/caddyserver/caddy/issues/7524.
+func TestReverseProxyHealthCheckPortUsed(t *testing.T) {
+	// upstream server: serves proxied requests normally, but returns 503 for
+	// /health so that if health checks mistakenly hit this port the upstream
+	// gets marked unhealthy and the proxy returns 503.
+	upstreamSrv := &http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			if req.URL.Path == "/health" {
+				w.WriteHeader(http.StatusServiceUnavailable)
+				return
+			}
+			_, _ = w.Write([]byte("Hello, World!"))
+		}),
+	}
+	ln0, err := net.Listen("tcp", "127.0.0.1:2022")
+	if err != nil {
+		t.Fatalf("failed to listen on 127.0.0.1:2022: %v", err)
+	}
+	go upstreamSrv.Serve(ln0)
+	t.Cleanup(func() { upstreamSrv.Close(); ln0.Close() })
+
+	// separate health check server on the configured health_port: returns 200
+	// so the upstream is marked healthy only if health checks go to this port.
+	healthSrv := &http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			_, _ = w.Write([]byte("ok"))
+		}),
+	}
+	ln1, err := net.Listen("tcp", "127.0.0.1:2023")
+	if err != nil {
+		t.Fatalf("failed to listen on 127.0.0.1:2023: %v", err)
+	}
+	go healthSrv.Serve(ln1)
+	t.Cleanup(func() { healthSrv.Close(); ln1.Close() })
+
+	tester := caddytest.NewTester(t)
+	tester.InitServer(`
+	{
+		skip_install_trust
+		admin localhost:2999
+		http_port     9080
+		https_port    9443
+		grace_period 1ns
+	}
+	http://localhost:9080 {
+		reverse_proxy {
+			to localhost:2022
+
+			health_uri /health
+			health_port 2023
+			health_interval 10ms
+			health_timeout 100ms
+			health_passes 1
+			health_fails 1
+		}
+	}
+	`, "caddyfile")
 	tester.AssertGetResponse("http://localhost:9080/", 200, "Hello, World!")
 }

@@ -0,0 +1,15 @@
+# Used by import_block_snippet_non_replaced_block_from_separate_file.caddyfiletest
+
+(snippet) {
+	header {
+		reverse_proxy localhost:3000
+		{block}
+	}
+}
+
+# This snippet being unused by the test Caddyfile is intentional.
+# This is to test that a panic runtime error triggered by an out-of-range slice index access
+# will not happen again, please see issue #7518 and pull request #7543 for more information
+(unused_snippet) {
+    header SomeHeader SomeValue
+}
@@ -9,9 +9,14 @@ import (
 )

 var defaultFactory = newRootCommandFactory(func() *cobra.Command {
-	return &cobra.Command{
-		Use: "caddy",
-		Long: `Caddy is an extensible server platform written in Go.
+	bin := caddy.CustomBinaryName
+	if bin == "" {
+		bin = "caddy"
+	}
+
+	long := caddy.CustomLongDescription
+	if long == "" {
+		long = `Caddy is an extensible server platform written in Go.

 At its core, Caddy merely manages configuration. Modules are plugged
 in statically at compile-time to provide useful functionality. Caddy's
@@ -91,7 +96,12 @@ package installers: https://caddyserver.com/docs/install

 Instructions for running Caddy in production are also available:
 https://caddyserver.com/docs/running
-`,
+`
+	}
+
+	return &cobra.Command{
+		Use:  bin,
+		Long: long,
 		Example: `  $ caddy run
  $ caddy run --config caddy.json
  $ caddy reload --config caddy.json
@@ -74,7 +74,7 @@ func cmdStart(fl Flags) (int, error) {
 	// ensure it's the process we're expecting - we can be
 	// sure by giving it some random bytes and having it echo
 	// them back to us)
-	cmd := exec.Command(os.Args[0], "run", "--pingback", ln.Addr().String())
+	cmd := exec.Command(os.Args[0], "run", "--pingback", ln.Addr().String()) //nolint:gosec // no command injection that I can determine...
 	// we should be able to run caddy in relative paths
 	if errors.Is(cmd.Err, exec.ErrDot) {
 		cmd.Err = nil
@@ -372,7 +372,7 @@ func cmdReload(fl Flags) (int, error) {
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("no config file to load")
 	}

-	adminAddr, err := DetermineAdminAPIAddress(addressFlag, config, configFlag, configAdapterFlag)
+	adminAddr, err := DetermineAdminAPIAddress(addressFlag, config, configFile, configAdapterFlag)
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("couldn't determine admin API address: %v", err)
 	}
@@ -697,7 +697,7 @@ func cmdFmt(fl Flags) (int, error) {
 	output := caddyfile.Format(input)

 	if fl.Bool("overwrite") {
-		if err := os.WriteFile(configFile, output, 0o600); err != nil {
+		if err := os.WriteFile(configFile, output, 0o600); err != nil { //nolint:gosec // path traversal is not really a thing here, this is either "Caddyfile" or admin-controlled
 			return caddy.ExitCodeFailedStartup, fmt.Errorf("overwriting formatted file: %v", err)
 		}
 		return caddy.ExitCodeSuccess, nil
@@ -820,7 +820,7 @@ func AdminAPIRequest(adminAddr, method, uri string, headers http.Header, body io
 		},
 	}

-	resp, err := client.Do(req)
+	resp, err := client.Do(req) //nolint:gosec // the only SSRF here would be self-sabatoge I think
 	if err != nil {
 		return nil, fmt.Errorf("performing request: %v", err)
 	}
@@ -484,7 +484,13 @@ func setResourceLimits(logger *zap.Logger) func() {
 	// See https://pkg.go.dev/runtime/debug#SetMemoryLimit
 	_, _ = memlimit.SetGoMemLimitWithOpts(
 		memlimit.WithLogger(
-			slog.New(zapslog.NewHandler(logger.Core())),
+			slog.New(zapslog.NewHandler(
+				logger.Core(),
+				zapslog.WithName("memlimit"),
+				// the default enables traces at ERROR level, this disables
+				// them by setting it to a level higher than any other level
+				zapslog.AddStacktraceAt(slog.Level(127)),
+			)),
 		),
 		memlimit.WithProvider(
 			memlimit.ApplyFallback(
@@ -63,10 +63,17 @@ type Context struct {
 // modules which are loaded will be properly unloaded.
 // See standard library context package's documentation.
 func NewContext(ctx Context) (Context, context.CancelFunc) {
+	newCtx, cancelCause := NewContextWithCause(ctx)
+	return newCtx, func() { cancelCause(nil) }
+}
+
+// NewContextWithCause is like NewContext but returns a context.CancelCauseFunc.
+// EXPERIMENTAL: This API is subject to change.
+func NewContextWithCause(ctx Context) (Context, context.CancelCauseFunc) {
 	newCtx := Context{moduleInstances: make(map[string][]Module), cfg: ctx.cfg, metricsRegistry: prometheus.NewPedanticRegistry()}
-	c, cancel := context.WithCancel(ctx.Context)
-	wrappedCancel := func() {
-		cancel()
+	c, cancel := context.WithCancelCause(ctx.Context)
+	wrappedCancel := func(cause error) {
+		cancel(cause)

 		for _, f := range ctx.cleanupFuncs {
 			f()
@@ -608,6 +615,11 @@ func (ctx Context) Slogger() *slog.Logger {
 		core     zapcore.Core
 		moduleID string
 	)
+
+	// the default enables traces at ERROR level, this disables
+	// them by setting it to a level higher than any other level
+	tracesOpt := zapslog.AddStacktraceAt(slog.Level(127))
+
 	if ctx.cfg == nil {
 		// often the case in tests; just use a dev logger
 		l, err := zap.NewDevelopment()
@@ -616,16 +628,16 @@ func (ctx Context) Slogger() *slog.Logger {
 		}

 		core = l.Core()
-		handler = zapslog.NewHandler(core)
+		handler = zapslog.NewHandler(core, tracesOpt)
 	} else {
 		mod := ctx.Module()
 		if mod == nil {
 			core = Log().Core()
-			handler = zapslog.NewHandler(core)
+			handler = zapslog.NewHandler(core, tracesOpt)
 		} else {
 			moduleID = string(mod.CaddyModule().ID)
 			core = ctx.cfg.Logging.Logger(mod).Core()
-			handler = zapslog.NewHandler(core, zapslog.WithName(moduleID))
+			handler = zapslog.NewHandler(core, zapslog.WithName(moduleID), tracesOpt)
 		}
 	}

@@ -1,60 +1,61 @@
 module github.com/caddyserver/caddy/v2

-go 1.25
+go 1.25.0

 require (
 	github.com/BurntSushi/toml v1.6.0
 	github.com/DeRuina/timberjack v1.3.9
 	github.com/KimMachineGun/automemlimit v0.7.5
 	github.com/Masterminds/sprig/v3 v3.3.0
-	github.com/alecthomas/chroma/v2 v2.21.1
+	github.com/alecthomas/chroma/v2 v2.23.1
 	github.com/aryann/difflib v0.0.0-20210328193216-ff5ff6dc229b
-	github.com/caddyserver/certmagic v0.25.1
-	github.com/caddyserver/zerossl v0.1.4
-	github.com/cloudflare/circl v1.6.2
+	github.com/caddyserver/certmagic v0.25.2
+	github.com/caddyserver/zerossl v0.1.5
+	github.com/cloudflare/circl v1.6.3
 	github.com/dustin/go-humanize v1.0.1
-	github.com/go-chi/chi/v5 v5.2.3
-	github.com/google/cel-go v0.26.1
+	github.com/go-chi/chi/v5 v5.2.5
+	github.com/google/cel-go v0.27.0
 	github.com/google/uuid v1.6.0
-	github.com/klauspost/compress v1.18.2
+	github.com/klauspost/compress v1.18.4
 	github.com/klauspost/cpuid/v2 v2.3.0
-	github.com/mholt/acmez/v3 v3.1.4
+	github.com/mholt/acmez/v3 v3.1.6
 	github.com/prometheus/client_golang v1.23.2
 	github.com/quic-go/quic-go v0.59.0
-	github.com/smallstep/certificates v0.29.0
+	github.com/smallstep/certificates v0.30.0-rc3
 	github.com/smallstep/nosql v0.7.0
 	github.com/smallstep/truststore v0.13.0
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/pflag v1.0.10
 	github.com/stretchr/testify v1.11.1
 	github.com/tailscale/tscert v0.0.0-20251216020129-aea342f6d747
-	github.com/yuin/goldmark v1.7.15
+	github.com/yuin/goldmark v1.7.16
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
-	go.opentelemetry.io/contrib/exporters/autoexport v0.64.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.64.0
-	go.opentelemetry.io/contrib/propagators/autoprop v0.64.0
-	go.opentelemetry.io/otel v1.39.0
-	go.opentelemetry.io/otel/sdk v1.39.0
-	go.step.sm/crypto v0.75.0
+	go.opentelemetry.io/contrib/exporters/autoexport v0.65.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.65.0
+	go.opentelemetry.io/contrib/propagators/autoprop v0.65.0
+	go.opentelemetry.io/otel v1.40.0
+	go.opentelemetry.io/otel/sdk v1.40.0
+	go.step.sm/crypto v0.76.2
 	go.uber.org/automaxprocs v1.6.0
 	go.uber.org/zap v1.27.1
 	go.uber.org/zap/exp v0.3.0
-	golang.org/x/crypto v0.46.0
-	golang.org/x/crypto/x509roots/fallback v0.0.0-20250927194341-2beaa59a3c99
-	golang.org/x/net v0.48.0
+	golang.org/x/crypto v0.48.0
+	golang.org/x/crypto/x509roots/fallback v0.0.0-20260213171211-a408498e5541
+	golang.org/x/net v0.51.0
 	golang.org/x/sync v0.19.0
-	golang.org/x/term v0.38.0
+	golang.org/x/term v0.40.0
 	golang.org/x/time v0.14.0
 	gopkg.in/yaml.v3 v3.0.1
 )

 require (
-	cel.dev/expr v0.24.0 // indirect
-	cloud.google.com/go/auth v0.17.0 // indirect
+	cel.dev/expr v0.25.1 // indirect
+	cloud.google.com/go/auth v0.18.1 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
 	cloud.google.com/go/compute/metadata v0.9.0 // indirect
-	dario.cat/mergo v1.0.1 // indirect
-	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	dario.cat/mergo v1.0.2 // indirect
+	filippo.io/bigmod v0.1.0 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/ccoveille/go-safecast/v2 v2.0.0 // indirect
 	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/coreos/go-oidc/v3 v3.17.0 // indirect
@@ -63,12 +64,12 @@ require (
 	github.com/go-jose/go-jose/v3 v3.0.4 // indirect
 	github.com/go-jose/go-jose/v4 v4.1.3 // indirect
 	github.com/google/certificate-transparency-go v1.1.8-0.20240110162603-74a5dd331745 // indirect
-	github.com/google/go-tpm v0.9.7 // indirect
+	github.com/google/go-tpm v0.9.8 // indirect
 	github.com/google/go-tspi v0.3.0 // indirect
 	github.com/google/s2a-go v0.1.9 // indirect
-	github.com/googleapis/enterprise-certificate-proxy v0.3.7 // indirect
-	github.com/googleapis/gax-go/v2 v2.15.0 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.11 // indirect
+	github.com/googleapis/gax-go/v2 v2.17.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.7 // indirect
 	github.com/jackc/pgx/v5 v5.6.0 // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
@@ -86,39 +87,39 @@ require (
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/zeebo/blake3 v0.2.4 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/contrib/bridges/prometheus v0.64.0 // indirect
-	go.opentelemetry.io/contrib/propagators/aws v1.39.0 // indirect
-	go.opentelemetry.io/contrib/propagators/b3 v1.39.0 // indirect
-	go.opentelemetry.io/contrib/propagators/jaeger v1.39.0 // indirect
-	go.opentelemetry.io/contrib/propagators/ot v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/prometheus v0.61.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.39.0 // indirect
-	go.opentelemetry.io/otel/log v0.15.0 // indirect
-	go.opentelemetry.io/otel/sdk/log v0.15.0 // indirect
-	go.opentelemetry.io/otel/sdk/metric v1.39.0 // indirect
+	go.opentelemetry.io/contrib/bridges/prometheus v0.65.0 // indirect
+	go.opentelemetry.io/contrib/propagators/aws v1.40.0 // indirect
+	go.opentelemetry.io/contrib/propagators/b3 v1.40.0 // indirect
+	go.opentelemetry.io/contrib/propagators/jaeger v1.40.0 // indirect
+	go.opentelemetry.io/contrib/propagators/ot v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.62.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.40.0 // indirect
+	go.opentelemetry.io/otel/log v0.16.0 // indirect
+	go.opentelemetry.io/otel/sdk/log v0.16.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.40.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 // indirect
-	golang.org/x/oauth2 v0.33.0 // indirect
-	google.golang.org/api v0.256.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
+	golang.org/x/oauth2 v0.35.0 // indirect
+	google.golang.org/api v0.266.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260203192932-546029d2fa20 // indirect
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 // indirect
 )

 require (
-	filippo.io/edwards25519 v1.1.0 // indirect
+	filippo.io/edwards25519 v1.2.0 // indirect
 	github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96 // indirect
 	github.com/Masterminds/goutils v1.1.1 // indirect
-	github.com/Masterminds/semver/v3 v3.3.1 // indirect
+	github.com/Masterminds/semver/v3 v3.4.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0
@@ -144,35 +145,34 @@ require (
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
-	github.com/miekg/dns v1.1.69 // indirect
+	github.com/miekg/dns v1.1.72 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/go-ps v1.0.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
-	github.com/pires/go-proxyproto v0.8.1
+	github.com/pires/go-proxyproto v0.11.0
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_model v0.6.2
-	github.com/prometheus/common v0.67.4 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
 	github.com/prometheus/procfs v0.19.2 // indirect
 	github.com/rs/xid v1.6.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
-	github.com/sirupsen/logrus v1.9.3 // indirect
-	github.com/slackhq/nebula v1.9.7 // indirect
+	github.com/sirupsen/logrus v1.9.4 // indirect
+	github.com/slackhq/nebula v1.10.3 // indirect
 	github.com/spf13/cast v1.7.0 // indirect
-	github.com/stoewer/go-strcase v1.2.0 // indirect
 	github.com/urfave/cli v1.22.17 // indirect
 	go.etcd.io/bbolt v1.3.10 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.39.0 // indirect
-	go.opentelemetry.io/otel/metric v1.39.0 // indirect
-	go.opentelemetry.io/otel/trace v1.39.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 // indirect
+	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/trace v1.40.0
 	go.opentelemetry.io/proto/otlp v1.9.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/mod v0.30.0 // indirect
-	golang.org/x/sys v0.39.0
-	golang.org/x/text v0.32.0 // indirect
-	golang.org/x/tools v0.39.0 // indirect
-	google.golang.org/grpc v1.77.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	golang.org/x/mod v0.33.0 // indirect
+	golang.org/x/sys v0.41.0
+	golang.org/x/text v0.34.0
+	golang.org/x/tools v0.42.0 // indirect
+	google.golang.org/grpc v1.79.1 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 	howett.net/plist v1.0.0 // indirect
 )
@@ -1,23 +1,27 @@
-cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
-cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
-cloud.google.com/go v0.121.6 h1:waZiuajrI28iAf40cWgycWNgaXPO06dupuS+sgibK6c=
-cloud.google.com/go v0.121.6/go.mod h1:coChdst4Ea5vUpiALcYKXEpR1S9ZgXbhEzzMcMR66vI=
-cloud.google.com/go/auth v0.17.0 h1:74yCm7hCj2rUyyAocqnFzsAYXgJhrG26XCFimrc/Kz4=
-cloud.google.com/go/auth v0.17.0/go.mod h1:6wv/t5/6rOPAX4fJiRjKkJCvswLwdet7G8+UGXt7nCQ=
+cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
+cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
+cloud.google.com/go v0.123.0 h1:2NAUJwPR47q+E35uaJeYoNhuNEM9kM8SjgRgdeOJUSE=
+cloud.google.com/go v0.123.0/go.mod h1:xBoMV08QcqUGuPW65Qfm1o9Y4zKZBpGS+7bImXLTAZU=
+cloud.google.com/go/auth v0.18.1 h1:IwTEx92GFUo2pJ6Qea0EU3zYvKnTAeRCODxfA/G5UWs=
+cloud.google.com/go/auth v0.18.1/go.mod h1:GfTYoS9G3CWpRA3Va9doKN9mjPGRS+v41jmZAhBzbrA=
 cloud.google.com/go/auth/oauth2adapt v0.2.8 h1:keo8NaayQZ6wimpNSmW5OPc283g65QNIiLpZnkHRbnc=
 cloud.google.com/go/auth/oauth2adapt v0.2.8/go.mod h1:XQ9y31RkqZCcwJWNSx2Xvric3RrU88hAYYbjDWYDL+c=
 cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs=
 cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10=
-cloud.google.com/go/iam v1.5.2 h1:qgFRAGEmd8z6dJ/qyEchAuL9jpswyODjA2lS+w234g8=
-cloud.google.com/go/iam v1.5.2/go.mod h1:SE1vg0N81zQqLzQEwxL2WI6yhetBdbNQuTvIKCSkUHE=
-cloud.google.com/go/kms v1.23.2 h1:4IYDQL5hG4L+HzJBhzejUySoUOheh3Lk5YT4PCyyW6k=
-cloud.google.com/go/kms v1.23.2/go.mod h1:rZ5kK0I7Kn9W4erhYVoIRPtpizjunlrfU4fUkumUp8g=
-cloud.google.com/go/longrunning v0.7.0 h1:FV0+SYF1RIj59gyoWDRi45GiYUMM3K1qO51qoboQT1E=
-cloud.google.com/go/longrunning v0.7.0/go.mod h1:ySn2yXmjbK9Ba0zsQqunhDkYi0+9rlXIwnoAf+h+TPY=
-dario.cat/mergo v1.0.1 h1:Ra4+bf83h2ztPIQYNP99R6m+Y7KfnARDfID+a+vLl4s=
-dario.cat/mergo v1.0.1/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
-filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
-filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+cloud.google.com/go/iam v1.5.3 h1:+vMINPiDF2ognBJ97ABAYYwRgsaqxPbQDlMnbHMjolc=
+cloud.google.com/go/iam v1.5.3/go.mod h1:MR3v9oLkZCTlaqljW6Eb2d3HGDGK5/bDv93jhfISFvU=
+cloud.google.com/go/kms v1.25.0 h1:gVqvGGUmz0nYCmtoxWmdc1wli2L1apgP8U4fghPGSbQ=
+cloud.google.com/go/kms v1.25.0/go.mod h1:XIdHkzfj0bUO3E+LvwPg+oc7s58/Ns8Nd8Sdtljihbk=
+cloud.google.com/go/longrunning v0.8.0 h1:LiKK77J3bx5gDLi4SMViHixjD2ohlkwBi+mKA7EhfW8=
+cloud.google.com/go/longrunning v0.8.0/go.mod h1:UmErU2Onzi+fKDg2gR7dusz11Pe26aknR4kHmJJqIfk=
+code.pfad.fr/check v1.1.0 h1:GWvjdzhSEgHvEHe2uJujDcpmZoySKuHQNrZMfzfO0bE=
+code.pfad.fr/check v1.1.0/go.mod h1:NiUH13DtYsb7xp5wll0U4SXx7KhXQVCtRgdC96IPfoM=
+dario.cat/mergo v1.0.2 h1:85+piFYR1tMbRrLcDwR18y4UKJ3aH1Tbzi24VRW1TK8=
+dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
+filippo.io/bigmod v0.1.0 h1:UNzDk7y9ADKST+axd9skUpBQeW7fG2KrTZyOE4uGQy8=
+filippo.io/bigmod v0.1.0/go.mod h1:OjOXDNlClLblvXdwgFFOQFJEocLhhtai8vGLy0JCZlI=
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@@ -102,8 +106,8 @@ github.com/chzyer/readline v1.5.1/go.mod h1:Eh+b79XXUwfKfcPLepksvw2tcLE/Ct21YObk
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@@ -143,8 +147,8 @@ github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7z
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@@ -164,8 +168,8 @@ github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
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@@ -173,8 +177,8 @@ github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
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@@ -183,12 +187,12 @@ github.com/google/s2a-go v0.1.9 h1:LGD7gtMgezd8a/Xak7mEWL0PjoTQFvpRudN895yqKW0=
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@@ -207,8 +211,8 @@ github.com/jackc/puddle/v2 v2.2.1 h1:RhxXJtFG022u4ibrCSMSiu5aOq1i77R3OHKNJj77OAk
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@@ -221,6 +225,10 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
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@@ -232,10 +240,10 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
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@@ -251,8 +259,8 @@ github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58/go.mod h1:DXv8WO4yhM
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@@ -264,8 +272,8 @@ github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h
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@@ -287,14 +295,14 @@ github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp
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@@ -325,8 +333,6 @@ github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An
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@@ -334,7 +340,6 @@ github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/
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 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
@@ -354,8 +359,8 @@ github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcY
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/goldmark v1.4.15/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/yuin/goldmark v1.7.15 h1:xYJWgq3Qd8qsaZpj5pHKoEI4mosqVZi/qRpq/MdKyyk=
-github.com/yuin/goldmark v1.7.15/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
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 github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc h1:+IAOyRda+RLrxa1WC7umKOZRsGq4QrFFMYApOeHzQwQ=
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 github.com/zeebo/assert v1.1.0 h1:hU1L1vLTHsnO8x8c9KAR5GmM5QscxHg5RNU5z5qbUWY=
@@ -368,66 +373,66 @@ go.etcd.io/bbolt v1.3.10 h1:+BqfJTcCzTItrop8mq/lbzL8wSGtj94UO/3U31shqG0=
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 go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
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+go.opentelemetry.io/otel/sdk/metric v1.40.0 h1:mtmdVqgQkeRxHgRv4qhyJduP3fYJRMX4AtAlbuWdCYw=
+go.opentelemetry.io/otel/sdk/metric v1.40.0/go.mod h1:4Z2bGMf0KSK3uRjlczMOeMhKU2rhUqdWNoKcYrtcBPg=
+go.opentelemetry.io/otel/trace v1.40.0 h1:WA4etStDttCSYuhwvEa8OP8I5EWu24lkOzp+ZYblVjw=
+go.opentelemetry.io/otel/trace v1.40.0/go.mod h1:zeAhriXecNGP/s2SEG3+Y8X9ujcJOTqQ5RgdEJcawiA=
 go.opentelemetry.io/proto/otlp v1.9.0 h1:l706jCMITVouPOqEnii2fIAuO3IVGBRPV5ICjceRb/A=
 go.opentelemetry.io/proto/otlp v1.9.0/go.mod h1:xE+Cx5E/eEHw+ISFkwPLwCZefwVjY+pqKg1qcK03+/4=
-go.step.sm/crypto v0.75.0 h1:UAHYD6q6ggYyzLlIKHv1MCUVjZIesXRZpGTlRC/HSHw=
-go.step.sm/crypto v0.75.0/go.mod h1:wwQ57+ajmDype9mrI/2hRyrvJd7yja5xVgWYqpUN3PE=
+go.step.sm/crypto v0.76.2 h1:JJ/yMcs/rmcCAwlo+afrHjq74XBFRTJw5B2y4Q4Z4c4=
+go.step.sm/crypto v0.76.2/go.mod h1:m6KlB/HzIuGFep0UWI5e0SYi38UxpoKeCg6qUaHV6/Q=
 go.uber.org/automaxprocs v1.6.0 h1:O3y2/QNTOdbF+e/dpXNNW7Rx2hZ4sTIPyybbxyNqTUs=
 go.uber.org/automaxprocs v1.6.0/go.mod h1:ifeIMSnPZuznNm6jmdzmU3/bfk01Fe2fotchwEFJ8r8=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
@@ -451,19 +456,19 @@ golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliY
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
 golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
-golang.org/x/crypto v0.46.0 h1:cKRW/pmt1pKAfetfu+RCEvjvZkA9RimPbh7bhFjGVBU=
-golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0=
-golang.org/x/crypto/x509roots/fallback v0.0.0-20250927194341-2beaa59a3c99 h1:CH0o4/bZX6KIUCjjgjmtNtfM/kXSkTYlzTOB9vZF45g=
-golang.org/x/crypto/x509roots/fallback v0.0.0-20250927194341-2beaa59a3c99/go.mod h1:MEIPiCnxvQEjA4astfaKItNwEVZA5Ki+3+nyGbJ5N18=
-golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 h1:SbTAbRFnd5kjQXbczszQ0hdk3ctwYf3qBNH9jIsGclE=
-golang.org/x/exp v0.0.0-20250813145105-42675adae3e6/go.mod h1:4QTo5u+SEIbbKW1RacMZq1YEfOBqeXa19JeshGi+zc4=
+golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
+golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
+golang.org/x/crypto/x509roots/fallback v0.0.0-20260213171211-a408498e5541 h1:FmKxj9ocLKn45jiR2jQMwCVhDvaK7fKQFzfuT9GvyK8=
+golang.org/x/crypto/x509roots/fallback v0.0.0-20260213171211-a408498e5541/go.mod h1:+UoQFNBq2p2wO+Q6ddVtYc25GZ6VNdOMyyrd4nrqrKs=
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 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/mod v0.30.0 h1:fDEXFVZ/fmCKProc/yAXXUijritrDzahmwwefnjoPFk=
-golang.org/x/mod v0.30.0/go.mod h1:lAsf5O2EvJeSFMiBxXDki7sCgAxEUcZHXoXMKT4GJKc=
+golang.org/x/mod v0.33.0 h1:tHFzIWbBifEmbwtGz65eaWyGiGZatSrT9prnU8DbVL8=
+golang.org/x/mod v0.33.0/go.mod h1:swjeQEj+6r7fODbD2cqrnje9PnziFuw4bmLbBZFrQ5w=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
@@ -472,10 +477,10 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
-golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
-golang.org/x/oauth2 v0.33.0 h1:4Q+qn+E5z8gPRJfmRy7C2gGG3T4jIprK6aSYgTXGRpo=
-golang.org/x/oauth2 v0.33.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
+golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=
+golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=
+golang.org/x/oauth2 v0.35.0 h1:Mv2mzuHuZuY2+bkyWXIHMfhNdJAdwW3FuWeCPYN5GVQ=
+golang.org/x/oauth2 v0.35.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -493,7 +498,6 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -502,8 +506,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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 golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
-golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -513,8 +517,8 @@ golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
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 golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
-golang.org/x/term v0.38.0 h1:PQ5pkm/rLO6HnxFR7N2lJHOZX6Kez5Y1gDSJla6jo7Q=
-golang.org/x/term v0.38.0/go.mod h1:bSEAKrOT1W+VSu9TSCMtoGEOUcKxOKgl3LE5QEF/xVg=
+golang.org/x/term v0.40.0 h1:36e4zGLqU4yhjlmxEaagx2KuYbJq3EwY8K943ZsHcvg=
+golang.org/x/term v0.40.0/go.mod h1:w2P8uVp06p2iyKKuvXIm7N/y0UCRt3UfJTfZ7oOpglM=
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 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
@@ -524,8 +528,8 @@ golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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-golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
-golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
+golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
+golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
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@@ -534,25 +538,25 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
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-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
@@ -38,10 +38,6 @@ import (
 	"github.com/caddyserver/caddy/v2/internal"
 )

-// listenFdsStart is the first file descriptor number for systemd socket activation.
-// File descriptors 0, 1, 2 are reserved for stdin, stdout, stderr.
-const listenFdsStart = 3
-
 // NetworkAddress represents one or more network addresses.
 // It contains the individual components for a parsed network
 // address of the form accepted by ParseNetworkAddress().
@@ -233,7 +229,7 @@ func (na NetworkAddress) JoinHostPort(offset uint) string {
 func (na NetworkAddress) Expand() []NetworkAddress {
 	size := na.PortRangeSize()
 	addrs := make([]NetworkAddress, size)
-	for portOffset := uint(0); portOffset < size; portOffset++ {
+	for portOffset := range size {
 		addrs[portOffset] = na.At(portOffset)
 	}
 	return addrs
@@ -309,64 +305,6 @@ func IsFdNetwork(netw string) bool {
 	return strings.HasPrefix(netw, "fd")
 }

-// getFdByName returns the file descriptor number for the given
-// socket name from systemd's LISTEN_FDNAMES environment variable.
-// Socket names are provided by systemd via socket activation.
-//
-// The name can optionally include an index to handle multiple sockets
-// with the same name: "web:0" for first, "web:1" for second, etc.
-// If no index is specified, defaults to index 0 (first occurrence).
-func getFdByName(nameWithIndex string) (int, error) {
-	if nameWithIndex == "" {
-		return 0, fmt.Errorf("socket name cannot be empty")
-	}
-
-	fdNamesStr := os.Getenv("LISTEN_FDNAMES")
-	if fdNamesStr == "" {
-		return 0, fmt.Errorf("LISTEN_FDNAMES environment variable not set")
-	}
-
-	// Parse name and optional index
-	parts := strings.Split(nameWithIndex, ":")
-	if len(parts) > 2 {
-		return 0, fmt.Errorf("invalid socket name format '%s': too many colons", nameWithIndex)
-	}
-
-	name := parts[0]
-	targetIndex := 0
-
-	if len(parts) > 1 {
-		var err error
-		targetIndex, err = strconv.Atoi(parts[1])
-		if err != nil {
-			return 0, fmt.Errorf("invalid socket index '%s': %v", parts[1], err)
-		}
-		if targetIndex < 0 {
-			return 0, fmt.Errorf("socket index cannot be negative: %d", targetIndex)
-		}
-	}
-
-	// Parse the socket names
-	names := strings.Split(fdNamesStr, ":")
-
-	// Find the Nth occurrence of the requested name
-	matchCount := 0
-	for i, fdName := range names {
-		if fdName == name {
-			if matchCount == targetIndex {
-				return listenFdsStart + i, nil
-			}
-			matchCount++
-		}
-	}
-
-	if matchCount == 0 {
-		return 0, fmt.Errorf("socket name '%s' not found in LISTEN_FDNAMES", name)
-	}
-
-	return 0, fmt.Errorf("socket name '%s' found %d times, but index %d requested", name, matchCount, targetIndex)
-}
-
 // ParseNetworkAddress parses addr into its individual
 // components. The input string is expected to be of
 // the form "network/host:port-range" where any part is
@@ -398,27 +336,9 @@ func ParseNetworkAddressWithDefaults(addr, defaultNetwork string, defaultPort ui
 		}, err
 	}
 	if IsFdNetwork(network) {
-		fdAddr := host
-
-		// Handle named socket activation (fdname/name, fdgramname/name)
-		if strings.HasPrefix(network, "fdname") || strings.HasPrefix(network, "fdgramname") {
-			fdNum, err := getFdByName(host)
-			if err != nil {
-				return NetworkAddress{}, fmt.Errorf("named socket activation: %v", err)
-			}
-			fdAddr = strconv.Itoa(fdNum)
-
-			// Normalize network to standard fd/fdgram
-			if strings.HasPrefix(network, "fdname") {
-				network = "fd"
-			} else {
-				network = "fdgram"
-			}
-		}
-
 		return NetworkAddress{
 			Network: network,
-			Host:    fdAddr,
+			Host:    host,
 		}, nil
 	}
 	var start, end uint64
@@ -511,7 +431,7 @@ func JoinNetworkAddress(network, host, port string) string {
 //
 // NOTE: This API is EXPERIMENTAL and may be changed or removed.
 // NOTE: user should close the returned listener twice, once to stop accepting new connections, the second time to free up the packet conn.
-func (na NetworkAddress) ListenQUIC(ctx context.Context, portOffset uint, config net.ListenConfig, tlsConf *tls.Config, pcWrappers []PacketConnWrapper) (http3.QUICListener, error) {
+func (na NetworkAddress) ListenQUIC(ctx context.Context, portOffset uint, config net.ListenConfig, tlsConf *tls.Config, pcWrappers []PacketConnWrapper, allow0rttconf *bool) (http3.QUICListener, error) {
 	lnKey := listenerKey("quic"+na.Network, na.JoinHostPort(portOffset))

 	sharedEarlyListener, _, err := listenerPool.LoadOrNew(lnKey, func() (Destructor, error) {
@@ -550,10 +470,14 @@ func (na NetworkAddress) ListenQUIC(ctx context.Context, portOffset uint, config
 			Conn:                h3ln,
 			VerifySourceAddress: func(addr net.Addr) bool { return !limiter.Allow() },
 		}
+		allow0rtt := true
+		if allow0rttconf != nil {
+			allow0rtt = *allow0rttconf
+		}
 		earlyLn, err := tr.ListenEarly(
 			http3.ConfigureTLSConfig(quicTlsConfig),
 			&quic.Config{
-				Allow0RTT: true,
+				Allow0RTT: allow0rtt,
 				Tracer:    h3qlog.DefaultConnectionTracer,
 			},
 		)
@@ -588,7 +512,7 @@ func ListenerUsage(network, addr string) int {
 // contextAndCancelFunc groups context and its cancelFunc
 type contextAndCancelFunc struct {
 	context.Context
-	context.CancelFunc
+	context.CancelCauseFunc
 }

 // sharedQUICState manages GetConfigForClient
@@ -618,17 +542,17 @@ func (sqs *sharedQUICState) getConfigForClient(ch *tls.ClientHelloInfo) (*tls.Co

 // addState adds tls.Config and activeRequests to the map if not present and returns the corresponding context and its cancelFunc
 // so that when cancelled, the active tls.Config will change
-func (sqs *sharedQUICState) addState(tlsConfig *tls.Config) (context.Context, context.CancelFunc) {
+func (sqs *sharedQUICState) addState(tlsConfig *tls.Config) (context.Context, context.CancelCauseFunc) {
 	sqs.rmu.Lock()
 	defer sqs.rmu.Unlock()

 	if cacc, ok := sqs.tlsConfs[tlsConfig]; ok {
-		return cacc.Context, cacc.CancelFunc
+		return cacc.Context, cacc.CancelCauseFunc
 	}

-	ctx, cancel := context.WithCancel(context.Background())
-	wrappedCancel := func() {
-		cancel()
+	ctx, cancel := context.WithCancelCause(context.Background())
+	wrappedCancel := func(cause error) {
+		cancel(cause)

 		sqs.rmu.Lock()
 		defer sqs.rmu.Unlock()
@@ -684,13 +608,13 @@ func fakeClosedErr(l interface{ Addr() net.Addr }) error {
 // indicating that it is pretending to be closed so that the
 // server using it can terminate, while the underlying
 // socket is actually left open.
-var errFakeClosed = fmt.Errorf("listener 'closed' 😉")
+var errFakeClosed = fmt.Errorf("QUIC listener 'closed' 😉")

 type fakeCloseQuicListener struct {
 	closed              int32 // accessed atomically; belongs to this struct only
 	*sharedQuicListener       // embedded, so we also become a quic.EarlyListener
 	context             context.Context
-	contextCancel       context.CancelFunc
+	contextCancel       context.CancelCauseFunc
 }

 // Currently Accept ignores the passed context, however a situation where
@@ -713,7 +637,7 @@ func (fcql *fakeCloseQuicListener) Accept(_ context.Context) (*quic.Conn, error)

 func (fcql *fakeCloseQuicListener) Close() error {
 	if atomic.CompareAndSwapInt32(&fcql.closed, 0, 1) {
-		fcql.contextCancel()
+		fcql.contextCancel(errFakeClosed)
 	} else if atomic.CompareAndSwapInt32(&fcql.closed, 1, 2) {
 		_, _ = listenerPool.Delete(fcql.sharedQuicListener.key)
 	}
@@ -15,7 +15,6 @@
 package caddy

 import (
-	"os"
 	"reflect"
 	"testing"

@@ -653,286 +652,3 @@ func TestSplitUnixSocketPermissionsBits(t *testing.T) {
 		}
 	}
 }
-
-// TestGetFdByName tests the getFdByName function for systemd socket activation.
-func TestGetFdByName(t *testing.T) {
-	// Save original environment
-	originalFdNames := os.Getenv("LISTEN_FDNAMES")
-
-	// Restore environment after test
-	defer func() {
-		if originalFdNames != "" {
-			os.Setenv("LISTEN_FDNAMES", originalFdNames)
-		} else {
-			os.Unsetenv("LISTEN_FDNAMES")
-		}
-	}()
-
-	tests := []struct {
-		name        string
-		fdNames     string
-		socketName  string
-		expectedFd  int
-		expectError bool
-	}{
-		{
-			name:       "simple http socket",
-			fdNames:    "http",
-			socketName: "http",
-			expectedFd: 3,
-		},
-		{
-			name:       "multiple different sockets - first",
-			fdNames:    "http:https:dns",
-			socketName: "http",
-			expectedFd: 3,
-		},
-		{
-			name:       "multiple different sockets - second",
-			fdNames:    "http:https:dns",
-			socketName: "https",
-			expectedFd: 4,
-		},
-		{
-			name:       "multiple different sockets - third",
-			fdNames:    "http:https:dns",
-			socketName: "dns",
-			expectedFd: 5,
-		},
-		{
-			name:       "duplicate names - first occurrence (no index)",
-			fdNames:    "web:web:api",
-			socketName: "web",
-			expectedFd: 3,
-		},
-		{
-			name:       "duplicate names - first occurrence (explicit index 0)",
-			fdNames:    "web:web:api",
-			socketName: "web:0",
-			expectedFd: 3,
-		},
-		{
-			name:       "duplicate names - second occurrence (index 1)",
-			fdNames:    "web:web:api",
-			socketName: "web:1",
-			expectedFd: 4,
-		},
-		{
-			name:       "complex duplicates - first api",
-			fdNames:    "web:api:web:api:dns",
-			socketName: "api:0",
-			expectedFd: 4,
-		},
-		{
-			name:       "complex duplicates - second api",
-			fdNames:    "web:api:web:api:dns",
-			socketName: "api:1",
-			expectedFd: 6,
-		},
-		{
-			name:       "complex duplicates - first web",
-			fdNames:    "web:api:web:api:dns",
-			socketName: "web:0",
-			expectedFd: 3,
-		},
-		{
-			name:       "complex duplicates - second web",
-			fdNames:    "web:api:web:api:dns",
-			socketName: "web:1",
-			expectedFd: 5,
-		},
-		{
-			name:        "socket not found",
-			fdNames:     "http:https",
-			socketName:  "missing",
-			expectError: true,
-		},
-		{
-			name:        "empty socket name",
-			fdNames:     "http",
-			socketName:  "",
-			expectError: true,
-		},
-		{
-			name:        "missing LISTEN_FDNAMES",
-			fdNames:     "",
-			socketName:  "http",
-			expectError: true,
-		},
-		{
-			name:        "index out of range",
-			fdNames:     "web:web",
-			socketName:  "web:2",
-			expectError: true,
-		},
-		{
-			name:        "negative index",
-			fdNames:     "web",
-			socketName:  "web:-1",
-			expectError: true,
-		},
-		{
-			name:        "invalid index format",
-			fdNames:     "web",
-			socketName:  "web:abc",
-			expectError: true,
-		},
-		{
-			name:        "too many colons",
-			fdNames:     "web",
-			socketName:  "web:0:extra",
-			expectError: true,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			// Set up environment
-			if tc.fdNames != "" {
-				os.Setenv("LISTEN_FDNAMES", tc.fdNames)
-			} else {
-				os.Unsetenv("LISTEN_FDNAMES")
-			}
-
-			// Test the function
-			fd, err := getFdByName(tc.socketName)
-
-			if tc.expectError {
-				if err == nil {
-					t.Errorf("Expected error but got none")
-				}
-			} else {
-				if err != nil {
-					t.Errorf("Expected no error but got: %v", err)
-				}
-				if fd != tc.expectedFd {
-					t.Errorf("Expected FD %d but got %d", tc.expectedFd, fd)
-				}
-			}
-		})
-	}
-}
-
-// TestParseNetworkAddressFdName tests parsing of fdname and fdgramname addresses.
-func TestParseNetworkAddressFdName(t *testing.T) {
-	// Save and restore environment
-	originalFdNames := os.Getenv("LISTEN_FDNAMES")
-	defer func() {
-		if originalFdNames != "" {
-			os.Setenv("LISTEN_FDNAMES", originalFdNames)
-		} else {
-			os.Unsetenv("LISTEN_FDNAMES")
-		}
-	}()
-
-	// Set up test environment
-	os.Setenv("LISTEN_FDNAMES", "http:https:dns")
-
-	tests := []struct {
-		input      string
-		expectAddr NetworkAddress
-		expectErr  bool
-	}{
-		{
-			input: "fdname/http",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "3",
-			},
-		},
-		{
-			input: "fdname/https",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "4",
-			},
-		},
-		{
-			input: "fdname/dns",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "5",
-			},
-		},
-		{
-			input: "fdname/http:0",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "3",
-			},
-		},
-		{
-			input: "fdname/https:0",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "4",
-			},
-		},
-		{
-			input: "fdgramname/http",
-			expectAddr: NetworkAddress{
-				Network: "fdgram",
-				Host:    "3",
-			},
-		},
-		{
-			input: "fdgramname/https",
-			expectAddr: NetworkAddress{
-				Network: "fdgram",
-				Host:    "4",
-			},
-		},
-		{
-			input: "fdgramname/http:0",
-			expectAddr: NetworkAddress{
-				Network: "fdgram",
-				Host:    "3",
-			},
-		},
-		{
-			input:     "fdname/nonexistent",
-			expectErr: true,
-		},
-		{
-			input:     "fdgramname/nonexistent",
-			expectErr: true,
-		},
-		{
-			input:     "fdname/http:99",
-			expectErr: true,
-		},
-		{
-			input:     "fdname/invalid:abc",
-			expectErr: true,
-		},
-		// Test that old fd/N syntax still works
-		{
-			input: "fd/7",
-			expectAddr: NetworkAddress{
-				Network: "fd",
-				Host:    "7",
-			},
-		},
-		{
-			input: "fdgram/8",
-			expectAddr: NetworkAddress{
-				Network: "fdgram",
-				Host:    "8",
-			},
-		},
-	}
-
-	for i, tc := range tests {
-		actualAddr, err := ParseNetworkAddress(tc.input)
-
-		if tc.expectErr && err == nil {
-			t.Errorf("Test %d (%s): Expected error but got none", i, tc.input)
-		}
-		if !tc.expectErr && err != nil {
-			t.Errorf("Test %d (%s): Expected no error but got: %v", i, tc.input, err)
-		}
-		if !tc.expectErr && !reflect.DeepEqual(tc.expectAddr, actualAddr) {
-			t.Errorf("Test %d (%s): Expected %+v but got %+v", i, tc.input, tc.expectAddr, actualAddr)
-		}
-	}
-}
@@ -18,6 +18,7 @@ import (
 	"cmp"
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"maps"
 	"net"
@@ -711,9 +712,10 @@ func (app *App) Stop() error {
 	// enforce grace period if configured
 	if app.GracePeriod > 0 {
 		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, time.Duration(app.GracePeriod))
+		timeout := time.Duration(app.GracePeriod)
+		ctx, cancel = context.WithTimeoutCause(ctx, timeout, fmt.Errorf("server graceful shutdown %ds timeout", int(timeout.Seconds())))
 		defer cancel()
-		app.logger.Info("servers shutting down; grace period initiated", zap.Duration("duration", time.Duration(app.GracePeriod)))
+		app.logger.Info("servers shutting down; grace period initiated", zap.Duration("duration", timeout))
 	} else {
 		app.logger.Info("servers shutting down with eternal grace period")
 	}
@@ -739,6 +741,9 @@ func (app *App) Stop() error {
 		}

 		if err := server.server.Shutdown(ctx); err != nil {
+			if cause := context.Cause(ctx); cause != nil && errors.Is(err, context.DeadlineExceeded) {
+				err = cause
+			}
 			app.logger.Error("server shutdown",
 				zap.Error(err),
 				zap.Strings("addresses", server.Listen))
@@ -762,6 +767,9 @@ func (app *App) Stop() error {
 		}

 		if err := server.h3server.Shutdown(ctx); err != nil {
+			if cause := context.Cause(ctx); cause != nil && errors.Is(err, context.DeadlineExceeded) {
+				err = cause
+			}
 			app.logger.Error("HTTP/3 server shutdown",
 				zap.Error(err),
 				zap.Strings("addresses", server.Listen))
@@ -424,6 +424,40 @@ redirServersLoop:
 		// we'll create a new server for all the listener addresses
 		// that are unused and serve the remaining redirects from it

+		// Sort redirect routes by host specificity to ensure exact matches
+		// take precedence over wildcards, preventing ambiguous routing.
+		slices.SortFunc(routes, func(a, b Route) int {
+			hostA := getFirstHostFromRoute(a)
+			hostB := getFirstHostFromRoute(b)
+
+			// Catch-all routes (empty host) have the lowest priority
+			if hostA == "" && hostB != "" {
+				return 1
+			}
+			if hostB == "" && hostA != "" {
+				return -1
+			}
+
+			hasWildcardA := strings.Contains(hostA, "*")
+			hasWildcardB := strings.Contains(hostB, "*")
+
+			// Exact domains take precedence over wildcards
+			if !hasWildcardA && hasWildcardB {
+				return -1
+			}
+			if hasWildcardA && !hasWildcardB {
+				return 1
+			}
+
+			// If both are exact or both are wildcards, the longer one is more specific
+			if len(hostA) != len(hostB) {
+				return len(hostB) - len(hostA)
+			}
+
+			// Tie-breaker: alphabetical order to ensure determinism
+			return strings.Compare(hostA, hostB)
+		})
+
 		// Use the sorted srvNames to consistently find the target server
 		for _, srvName := range srvNames {
 			srv := app.Servers[srvName]
@@ -580,6 +614,27 @@ func (app *App) createAutomationPolicies(ctx caddy.Context, internalNames, tails
 		}
 	}

+	// Ensure automation policies' CertMagic configs are rebuilt when
+	// ACME issuer templates may have been modified above (for example,
+	// alternate ports filled in by the HTTP app). If a policy is already
+	// provisioned, perform a lightweight rebuild of the CertMagic config
+	// so issuers receive SetConfig with the updated templates; otherwise
+	// run a normal Provision to initialize the policy.
+	for i, ap := range app.tlsApp.Automation.Policies {
+		// If the policy is already provisioned, rebuild only the CertMagic
+		// config so issuers get SetConfig with updated templates. Otherwise
+		// provision the policy normally (which may load modules).
+		if ap.IsProvisioned() {
+			if err := ap.RebuildCertMagic(app.tlsApp); err != nil {
+				return fmt.Errorf("rebuilding certmagic config for automation policy %d: %v", i, err)
+			}
+		} else {
+			if err := ap.Provision(app.tlsApp); err != nil {
+				return fmt.Errorf("provisioning automation policy %d after auto-HTTPS defaults: %v", i, err)
+			}
+		}
+	}
+
 	if basePolicy == nil {
 		// no base policy found; we will make one
 		basePolicy = new(caddytls.AutomationPolicy)
@@ -793,3 +848,26 @@ func isTailscaleDomain(name string) bool {
 }

 type acmeCapable interface{ GetACMEIssuer() *caddytls.ACMEIssuer }
+
+// getFirstHostFromRoute traverses a route's matchers to find the Host rule.
+// Since we are dealing with internally generated redirect routes, the host
+// is typically the first string within the MatchHost.
+func getFirstHostFromRoute(r Route) string {
+	for _, matcherSet := range r.MatcherSets {
+		for _, m := range matcherSet {
+			// Check if the matcher is of type MatchHost (value or pointer)
+			switch hm := m.(type) {
+			case MatchHost:
+				if len(hm) > 0 {
+					return hm[0]
+				}
+			case *MatchHost:
+				if len(*hm) > 0 {
+					return (*hm)[0]
+				}
+			}
+		}
+	}
+	// Return an empty string if it's a catch-all route (no specific host)
+	return ""
+}
@@ -19,7 +19,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"net/http"
 	"strings"
 	"sync"
@@ -244,7 +244,7 @@ func (c *Cache) makeRoom() {
 		// strategy; generating random numbers is cheap and
 		// ensures a much better distribution.
 		//nolint:gosec
-		rnd := weakrand.Intn(len(c.cache))
+		rnd := weakrand.IntN(len(c.cache))
 		i := 0
 		for key := range c.cache {
 			if i == rnd {
@@ -287,7 +287,7 @@ type Account struct {

 	// The user's hashed password, in Modular Crypt Format (with `$` prefix)
 	// or base64-encoded.
-	Password string `json:"password"`
+	Password string `json:"password"` //nolint:gosec // false positive, this is a hashed password

 	password []byte
 }
@@ -412,10 +412,12 @@ func CELMatcherImpl(macroName, funcName string, matcherDataTypes []*cel.Type, fa
 			return nil, fmt.Errorf("unsupported matcher data type: %s, %s", matcherDataTypes[0], matcherDataTypes[1])
 		}
 	case 3:
+		// nolint:gosec // false positive, impossible to be out of bounds; see: https://github.com/securego/gosec/issues/1525
 		if matcherDataTypes[0] == cel.StringType && matcherDataTypes[1] == cel.StringType && matcherDataTypes[2] == cel.StringType {
 			macro = parser.NewGlobalMacro(macroName, 3, celMatcherStringListMacroExpander(funcName))
 			matcherDataTypes = []*cel.Type{cel.ListType(cel.StringType)}
 		} else {
+			// nolint:gosec // false positive, impossible to be out of bounds; see: https://github.com/securego/gosec/issues/1525
 			return nil, fmt.Errorf("unsupported matcher data type: %s, %s, %s", matcherDataTypes[0], matcherDataTypes[1], matcherDataTypes[2])
 		}
 	}
@@ -665,12 +667,29 @@ func celMatcherJSONMacroExpander(funcName string) parser.MacroExpander {
 // map literals containing heterogeneous values, in this case string and list
 // of string.
 func CELValueToMapStrList(data ref.Val) (map[string][]string, error) {
+	// Prefer map[string]any, but newer cel-go versions may return map[any]any
 	mapStrType := reflect.TypeFor[map[string]any]()
 	mapStrRaw, err := data.ConvertToNative(mapStrType)
+	var mapStrIface map[string]any
 	if err != nil {
-		return nil, err
+		// Try map[any]any and convert keys to strings
+		mapAnyType := reflect.TypeFor[map[any]any]()
+		mapAnyRaw, err2 := data.ConvertToNative(mapAnyType)
+		if err2 != nil {
+			return nil, err
+		}
+		mapAnyIface := mapAnyRaw.(map[any]any)
+		mapStrIface = make(map[string]any, len(mapAnyIface))
+		for k, v := range mapAnyIface {
+			ks, ok := k.(string)
+			if !ok {
+				return nil, fmt.Errorf("unsupported map key type in header match: %T", k)
+			}
+			mapStrIface[ks] = v
+		}
+	} else {
+		mapStrIface = mapStrRaw.(map[string]any)
 	}
-	mapStrIface := mapStrRaw.(map[string]any)
 	mapStrListStr := make(map[string][]string, len(mapStrIface))
 	for k, v := range mapStrIface {
 		switch val := v.(type) {
@@ -685,13 +704,26 @@ func CELValueToMapStrList(data ref.Val) (map[string][]string, error) {
 			for i, elem := range val {
 				strVal, ok := elem.(types.String)
 				if !ok {
-					return nil, fmt.Errorf("unsupported value type in header match: %T", val)
+					return nil, fmt.Errorf("unsupported value type in matcher input: %T", val)
 				}
 				convVals[i] = string(strVal)
 			}
 			mapStrListStr[k] = convVals
+		case []any:
+			convVals := make([]string, len(val))
+			for i, elem := range val {
+				switch e := elem.(type) {
+				case string:
+					convVals[i] = e
+				case types.String:
+					convVals[i] = string(e)
+				default:
+					return nil, fmt.Errorf("unsupported element type in matcher input list: %T", elem)
+				}
+			}
+			mapStrListStr[k] = convVals
 		default:
-			return nil, fmt.Errorf("unsupported value type in header match: %T", val)
+			return nil, fmt.Errorf("unsupported value type in matcher input: %T", val)
 		}
 	}
 	return mapStrListStr, nil
@@ -17,7 +17,7 @@ package caddyhttp
 import (
 	"errors"
 	"fmt"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"path"
 	"runtime"
 	"strings"
@@ -98,7 +98,7 @@ func randString(n int, sameCase bool) string {
 	b := make([]byte, n)
 	for i := range b {
 		//nolint:gosec
-		b[i] = dict[weakrand.Int63()%int64(len(dict))]
+		b[i] = dict[weakrand.IntN(len(dict))]
 	}
 	return string(b)
 }
@@ -169,6 +169,7 @@ func (fsrv *FileServer) serveBrowse(fileSystem fs.FS, root, dirPath string, w ht

 		// Actual files
 		for _, item := range listing.Items {
+			//nolint:gosec // not sure how this could be XSS unless you lose control of the file system (like aren't sanitizing) and client ignores Content-Type of text/plain
 			if _, err := fmt.Fprintf(writer, "%s\t%s\t%s\n",
 				item.Name, item.HumanSize(), item.HumanModTime("January 2, 2006 at 15:04:05"),
 			); err != nil {
@@ -720,6 +720,7 @@ var globSafeRepl = strings.NewReplacer(
 	"*", "\\*",
 	"[", "\\[",
 	"?", "\\?",
+	"\\", "\\\\",
 )

 const (
@@ -20,7 +20,9 @@ import (
 	"net/http/httptest"
 	"net/url"
 	"os"
+	"path/filepath"
 	"runtime"
+	"strings"
 	"testing"

 	"github.com/caddyserver/caddy/v2"
@@ -28,6 +30,13 @@ import (
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
 )

+type testCase struct {
+	path         string
+	expectedPath string
+	expectedType string
+	matched      bool
+}
+
 func TestFileMatcher(t *testing.T) {
 	// Windows doesn't like colons in files names
 	isWindows := runtime.GOOS == "windows"
@@ -45,12 +54,7 @@ func TestFileMatcher(t *testing.T) {
 		f.Close()
 	}

-	for i, tc := range []struct {
-		path         string
-		expectedPath string
-		expectedType string
-		matched      bool
-	}{
+	for i, tc := range []testCase{
 		{
 			path:         "/foo.txt",
 			expectedPath: "/foo.txt",
@@ -116,44 +120,71 @@ func TestFileMatcher(t *testing.T) {
 			matched:      !isWindows,
 		},
 	} {
-		m := &MatchFile{
-			fsmap:    &filesystems.FileSystemMap{},
-			Root:     "./testdata",
-			TryFiles: []string{"{http.request.uri.path}", "{http.request.uri.path}/"},
-		}
+		fileMatcherTest(t, i, tc)
+	}
+}

-		u, err := url.Parse(tc.path)
-		if err != nil {
-			t.Errorf("Test %d: parsing path: %v", i, err)
-		}
+func TestFileMatcherNonWindows(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		return
+	}

-		req := &http.Request{URL: u}
-		repl := caddyhttp.NewTestReplacer(req)
+	// this is impossible to test on Windows, but tests a security patch for other platforms
+	tc := testCase{
+		path:         "/foodir/secr%5Cet.txt",
+		expectedPath: "/foodir/secr\\et.txt",
+		expectedType: "file",
+		matched:      true,
+	}

-		result, err := m.MatchWithError(req)
-		if err != nil {
-			t.Errorf("Test %d: unexpected error: %v", i, err)
-		}
-		if result != tc.matched {
-			t.Errorf("Test %d: expected match=%t, got %t", i, tc.matched, result)
-		}
+	f, err := os.Create(filepath.Join("testdata", strings.TrimPrefix(tc.expectedPath, "/")))
+	if err != nil {
+		t.Fatalf("could not create test file: %v", err)
+	}
+	defer f.Close()
+	defer os.Remove(f.Name())

-		rel, ok := repl.Get("http.matchers.file.relative")
-		if !ok && result {
-			t.Errorf("Test %d: expected replacer value", i)
-		}
-		if !result {
-			continue
-		}
+	fileMatcherTest(t, 0, tc)
+}

-		if rel != tc.expectedPath {
-			t.Errorf("Test %d: actual path: %v, expected: %v", i, rel, tc.expectedPath)
-		}
+func fileMatcherTest(t *testing.T, i int, tc testCase) {
+	m := &MatchFile{
+		fsmap:    &filesystems.FileSystemMap{},
+		Root:     "./testdata",
+		TryFiles: []string{"{http.request.uri.path}", "{http.request.uri.path}/"},
+	}

-		fileType, _ := repl.Get("http.matchers.file.type")
-		if fileType != tc.expectedType {
-			t.Errorf("Test %d: actual file type: %v, expected: %v", i, fileType, tc.expectedType)
-		}
+	u, err := url.Parse(tc.path)
+	if err != nil {
+		t.Errorf("Test %d: parsing path: %v", i, err)
+	}
+
+	req := &http.Request{URL: u}
+	repl := caddyhttp.NewTestReplacer(req)
+
+	result, err := m.MatchWithError(req)
+	if err != nil {
+		t.Errorf("Test %d: unexpected error: %v", i, err)
+	}
+	if result != tc.matched {
+		t.Errorf("Test %d: expected match=%t, got %t", i, tc.matched, result)
+	}
+
+	rel, ok := repl.Get("http.matchers.file.relative")
+	if !ok && result {
+		t.Errorf("Test %d: expected replacer value", i)
+	}
+	if !result {
+		return
+	}
+
+	if rel != tc.expectedPath {
+		t.Errorf("Test %d: actual path: %v, expected: %v", i, rel, tc.expectedPath)
+	}
+
+	fileType, _ := repl.Get("http.matchers.file.type")
+	if fileType != tc.expectedType {
+		t.Errorf("Test %d: actual file type: %v, expected: %v", i, fileType, tc.expectedType)
 	}
 }

@@ -20,7 +20,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"mime"
 	"net/http"
 	"os"
@@ -125,6 +125,11 @@ type FileServer struct {
 	// When possible, all paths are resolved to their absolute form before
 	// comparisons are made. For maximum clarity and explictness, use complete,
 	// absolute paths; or, for greater portability, use relative paths instead.
+	//
+	// Note that hide comparisons are case-sensitive. On case-insensitive
+	// filesystems, requests with different path casing may still resolve to the
+	// same file or directory on disk, so hide should not be treated as a
+	// security boundary for sensitive paths.
 	Hide []string `json:"hide,omitempty"`

 	// The names of files to try as index files if a folder is requested.
@@ -601,7 +606,7 @@ func (fsrv *FileServer) openFile(fileSystem fs.FS, filename string, w http.Respo
 		// maybe the server is under load and ran out of file descriptors?
 		// have client wait arbitrary seconds to help prevent a stampede
 		//nolint:gosec
-		backoff := weakrand.Intn(maxBackoff-minBackoff) + minBackoff
+		backoff := weakrand.IntN(maxBackoff-minBackoff) + minBackoff
 		w.Header().Set("Retry-After", strconv.Itoa(backoff))
 		if c := fsrv.logger.Check(zapcore.DebugLevel, "retry after backoff"); c != nil {
 			c.Write(zap.String("filename", filename), zap.Int("backoff", backoff), zap.Error(err))
@@ -161,11 +161,11 @@ func (ops *HeaderOps) Provision(_ caddy.Context) error {

 // containsPlaceholders checks if the string contains Caddy placeholder syntax {key}
 func containsPlaceholders(s string) bool {
-	openIdx := strings.Index(s, "{")
-	if openIdx == -1 {
+	_, after, ok := strings.Cut(s, "{")
+	if !ok {
 		return false
 	}
-	closeIdx := strings.Index(s[openIdx+1:], "}")
+	closeIdx := strings.Index(after, "}")
 	if closeIdx == -1 {
 		return false
 	}
@@ -262,13 +262,17 @@ func (m MatchHost) Provision(_ caddy.Context) error {
 		if err != nil {
 			return fmt.Errorf("converting hostname '%s' to ASCII: %v", host, err)
 		}
-		if asciiHost != host {
-			m[i] = asciiHost
-		}
 		normalizedHost := strings.ToLower(asciiHost)
 		if firstI, ok := seen[normalizedHost]; ok {
 			return fmt.Errorf("host at index %d is repeated at index %d: %s", firstI, i, host)
 		}
+		// Normalize exact hosts for standardized comparison in large-list fastpath later on.
+		// Keep wildcards/placeholders untouched.
+		if m.fuzzy(asciiHost) {
+			m[i] = asciiHost
+		} else {
+			m[i] = normalizedHost
+		}
 		seen[normalizedHost] = i
 	}

@@ -312,14 +316,15 @@ func (m MatchHost) MatchWithError(r *http.Request) (bool, error) {
 	}

 	if m.large() {
+		reqHostLower := strings.ToLower(reqHost)
 		// fast path: locate exact match using binary search (about 100-1000x faster for large lists)
 		pos := sort.Search(len(m), func(i int) bool {
 			if m.fuzzy(m[i]) {
 				return false
 			}
-			return m[i] >= reqHost
+			return m[i] >= reqHostLower
 		})
-		if pos < len(m) && m[pos] == reqHost {
+		if pos < len(m) && m[pos] == reqHostLower {
 			return true, nil
 		}
 	}
@@ -533,6 +538,7 @@ func (m MatchPath) MatchWithError(r *http.Request) (bool, error) {
 }

 func (MatchPath) matchPatternWithEscapeSequence(escapedPath, matchPath string) bool {
+	escapedPath = strings.ToLower(escapedPath)
 	// We would just compare the pattern against r.URL.Path,
 	// but the pattern contains %, indicating that we should
 	// compare at least some part of the path in raw/escaped
@@ -632,8 +638,8 @@ func (MatchPath) matchPatternWithEscapeSequence(escapedPath, matchPath string) b
 	// we can now treat rawpath globs (%*) as regular globs (*)
 	matchPath = strings.ReplaceAll(matchPath, "%*", "*")

-	// ignore error here because we can't handle it anyway=
-	matches, _ := path.Match(matchPath, sb.String())
+	// ignore error here because we can't handle it anyway
+	matches, _ := path.Match(matchPath, strings.ToLower(sb.String()))
 	return matches
 }

@@ -412,6 +412,16 @@ func TestPathMatcher(t *testing.T) {
 			input:  "/foo%2fbar/baz",
 			expect: true,
 		},
+		{
+			match:  MatchPath{"/admin%2fpanel"},
+			input:  "/ADMIN%2fpanel",
+			expect: true,
+		},
+		{
+			match:  MatchPath{"/admin%2fpa*el"},
+			input:  "/ADMIN%2fPaAzZLm123NEL",
+			expect: true,
+		},
 	} {
 		err := tc.match.Provision(caddy.Context{})
 		if err == nil && tc.provisionErr {
@@ -957,6 +967,7 @@ func TestVarREMatcher(t *testing.T) {
 		desc       string
 		match      MatchVarsRE
 		input      VarsMiddleware
+		headers    http.Header
 		expect     bool
 		expectRepl map[string]string
 	}{
@@ -991,6 +1002,14 @@ func TestVarREMatcher(t *testing.T) {
 			input:  VarsMiddleware{"Var1": "var1Value"},
 			expect: true,
 		},
+		{
+			desc:       "placeholder key value containing braces is not double-expanded",
+			match:      MatchVarsRE{"{http.request.header.X-Input}": &MatchRegexp{Pattern: ".+", Name: "val"}},
+			input:      VarsMiddleware{},
+			headers:    http.Header{"X-Input": []string{"{env.HOME}"}},
+			expect:     true,
+			expectRepl: map[string]string{"val.0": "{env.HOME}"},
+		},
 	} {
 		t.Run(tc.desc, func(t *testing.T) {
 			t.Parallel()
@@ -1007,7 +1026,7 @@ func TestVarREMatcher(t *testing.T) {
 			}

 			// set up the fake request and its Replacer
-			req := &http.Request{URL: new(url.URL), Method: http.MethodGet}
+			req := &http.Request{URL: new(url.URL), Method: http.MethodGet, Header: tc.headers}
 			repl := caddy.NewReplacer()
 			ctx := context.WithValue(req.Context(), caddy.ReplacerCtxKey, repl)
 			ctx = context.WithValue(ctx, VarsCtxKey, make(map[string]any))
@@ -214,21 +214,24 @@ func serverNameFromContext(ctx context.Context) string {
 	return srv.name
 }

-type metricsInstrumentedHandler struct {
+// metricsInstrumentedRoute wraps a compiled route Handler with metrics
+// instrumentation. It wraps the entire compiled route chain once,
+// collecting metrics only once per route match.
+type metricsInstrumentedRoute struct {
 	handler string
-	mh      MiddlewareHandler
+	next    Handler
 	metrics *Metrics
 }

-func newMetricsInstrumentedHandler(ctx caddy.Context, handler string, mh MiddlewareHandler, metrics *Metrics) *metricsInstrumentedHandler {
-	metrics.init.Do(func() {
-		initHTTPMetrics(ctx, metrics)
+func newMetricsInstrumentedRoute(ctx caddy.Context, handler string, next Handler, m *Metrics) *metricsInstrumentedRoute {
+	m.init.Do(func() {
+		initHTTPMetrics(ctx, m)
 	})

-	return &metricsInstrumentedHandler{handler, mh, metrics}
+	return &metricsInstrumentedRoute{handler: handler, next: next, metrics: m}
 }

-func (h *metricsInstrumentedHandler) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error {
+func (h *metricsInstrumentedRoute) ServeHTTP(w http.ResponseWriter, r *http.Request) error {
 	server := serverNameFromContext(r.Context())
 	labels := prometheus.Labels{"server": server, "handler": h.handler}
 	method := metrics.SanitizeMethod(r.Method)
@@ -267,7 +270,7 @@ func (h *metricsInstrumentedHandler) ServeHTTP(w http.ResponseWriter, r *http.Re
 		return false
 	})
 	wrec := NewResponseRecorder(w, nil, writeHeaderRecorder)
-	err := h.mh.ServeHTTP(wrec, r, next)
+	err := h.next.ServeHTTP(wrec, r)
 	dur := time.Since(start).Seconds()
 	h.metrics.httpMetrics.requestCount.With(labels).Inc()

@@ -47,16 +47,12 @@ func TestMetricsInstrumentedHandler(t *testing.T) {
 		return handlerErr
 	})

-	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
-		return h.ServeHTTP(w, r)
-	})
-
-	ih := newMetricsInstrumentedHandler(ctx, "bar", mh, metrics)
+	ih := newMetricsInstrumentedRoute(ctx, "bar", h, metrics)

 	r := httptest.NewRequest("GET", "/", nil)
 	w := httptest.NewRecorder()

-	if actual := ih.ServeHTTP(w, r, h); actual != handlerErr {
+	if actual := ih.ServeHTTP(w, r); actual != handlerErr {
 		t.Errorf("Not same: expected %#v, but got %#v", handlerErr, actual)
 	}
 	if actual := testutil.ToFloat64(metrics.httpMetrics.requestInFlight); actual != 0.0 {
@@ -64,19 +60,19 @@ func TestMetricsInstrumentedHandler(t *testing.T) {
 	}

 	handlerErr = nil
-	if err := ih.ServeHTTP(w, r, h); err != nil {
+	if err := ih.ServeHTTP(w, r); err != nil {
 		t.Errorf("Received unexpected error: %v", err)
 	}

 	// an empty handler - no errors, no header written
-	mh = middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	emptyHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		return nil
 	})
-	ih = newMetricsInstrumentedHandler(ctx, "empty", mh, metrics)
+	ih = newMetricsInstrumentedRoute(ctx, "empty", emptyHandler, metrics)
 	r = httptest.NewRequest("GET", "/", nil)
 	w = httptest.NewRecorder()

-	if err := ih.ServeHTTP(w, r, h); err != nil {
+	if err := ih.ServeHTTP(w, r); err != nil {
 		t.Errorf("Received unexpected error: %v", err)
 	}
 	if actual := w.Result().StatusCode; actual != 200 {
@@ -87,16 +83,16 @@ func TestMetricsInstrumentedHandler(t *testing.T) {
 	}

 	// handler returning an error with an HTTP status
-	mh = middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	errHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		return Error(http.StatusTooManyRequests, nil)
 	})

-	ih = newMetricsInstrumentedHandler(ctx, "foo", mh, metrics)
+	ih = newMetricsInstrumentedRoute(ctx, "foo", errHandler, metrics)

 	r = httptest.NewRequest("GET", "/", nil)
 	w = httptest.NewRecorder()

-	if err := ih.ServeHTTP(w, r, nil); err == nil {
+	if err := ih.ServeHTTP(w, r); err == nil {
 		t.Errorf("expected error to be propagated")
 	}

@@ -225,16 +221,12 @@ func TestMetricsInstrumentedHandlerPerHost(t *testing.T) {
 		return handlerErr
 	})

-	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
-		return h.ServeHTTP(w, r)
-	})
-
-	ih := newMetricsInstrumentedHandler(ctx, "bar", mh, metrics)
+	ih := newMetricsInstrumentedRoute(ctx, "bar", h, metrics)

 	r := httptest.NewRequest("GET", "/", nil)
 	w := httptest.NewRecorder()

-	if actual := ih.ServeHTTP(w, r, h); actual != handlerErr {
+	if actual := ih.ServeHTTP(w, r); actual != handlerErr {
 		t.Errorf("Not same: expected %#v, but got %#v", handlerErr, actual)
 	}
 	if actual := testutil.ToFloat64(metrics.httpMetrics.requestInFlight); actual != 0.0 {
@@ -242,19 +234,19 @@ func TestMetricsInstrumentedHandlerPerHost(t *testing.T) {
 	}

 	handlerErr = nil
-	if err := ih.ServeHTTP(w, r, h); err != nil {
+	if err := ih.ServeHTTP(w, r); err != nil {
 		t.Errorf("Received unexpected error: %v", err)
 	}

 	// an empty handler - no errors, no header written
-	mh = middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	emptyHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		return nil
 	})
-	ih = newMetricsInstrumentedHandler(ctx, "empty", mh, metrics)
+	ih = newMetricsInstrumentedRoute(ctx, "empty", emptyHandler, metrics)
 	r = httptest.NewRequest("GET", "/", nil)
 	w = httptest.NewRecorder()

-	if err := ih.ServeHTTP(w, r, h); err != nil {
+	if err := ih.ServeHTTP(w, r); err != nil {
 		t.Errorf("Received unexpected error: %v", err)
 	}
 	if actual := w.Result().StatusCode; actual != 200 {
@@ -265,16 +257,16 @@ func TestMetricsInstrumentedHandlerPerHost(t *testing.T) {
 	}

 	// handler returning an error with an HTTP status
-	mh = middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	errHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		return Error(http.StatusTooManyRequests, nil)
 	})

-	ih = newMetricsInstrumentedHandler(ctx, "foo", mh, metrics)
+	ih = newMetricsInstrumentedRoute(ctx, "foo", errHandler, metrics)

 	r = httptest.NewRequest("GET", "/", nil)
 	w = httptest.NewRecorder()

-	if err := ih.ServeHTTP(w, r, nil); err == nil {
+	if err := ih.ServeHTTP(w, r); err == nil {
 		t.Errorf("expected error to be propagated")
 	}

@@ -397,30 +389,30 @@ func TestMetricsCardinalityProtection(t *testing.T) {
 	// Add one allowed host
 	metrics.allowedHosts["allowed.com"] = struct{}{}

-	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	h := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		w.Write([]byte("hello"))
 		return nil
 	})

-	ih := newMetricsInstrumentedHandler(ctx, "test", mh, metrics)
+	ih := newMetricsInstrumentedRoute(ctx, "test", h, metrics)

 	// Test request to allowed host
 	r1 := httptest.NewRequest("GET", "http://allowed.com/", nil)
 	r1.Host = "allowed.com"
 	w1 := httptest.NewRecorder()
-	ih.ServeHTTP(w1, r1, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+	ih.ServeHTTP(w1, r1)

 	// Test request to unknown host (should be mapped to "_other")
 	r2 := httptest.NewRequest("GET", "http://attacker.com/", nil)
 	r2.Host = "attacker.com"
 	w2 := httptest.NewRecorder()
-	ih.ServeHTTP(w2, r2, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+	ih.ServeHTTP(w2, r2)

 	// Test request to another unknown host (should also be mapped to "_other")
 	r3 := httptest.NewRequest("GET", "http://evil.com/", nil)
 	r3.Host = "evil.com"
 	w3 := httptest.NewRecorder()
-	ih.ServeHTTP(w3, r3, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+	ih.ServeHTTP(w3, r3)

 	// Check that metrics contain:
 	// - One entry for "allowed.com"
@@ -452,26 +444,26 @@ func TestMetricsHTTPSCatchAll(t *testing.T) {
 		allowedHosts:         make(map[string]struct{}), // Empty - no explicitly allowed hosts
 	}

-	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+	h := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 		w.Write([]byte("hello"))
 		return nil
 	})

-	ih := newMetricsInstrumentedHandler(ctx, "test", mh, metrics)
+	ih := newMetricsInstrumentedRoute(ctx, "test", h, metrics)

 	// Test HTTPS request (should be allowed even though not in allowedHosts)
 	r1 := httptest.NewRequest("GET", "https://unknown.com/", nil)
 	r1.Host = "unknown.com"
 	r1.TLS = &tls.ConnectionState{} // Mark as TLS/HTTPS
 	w1 := httptest.NewRecorder()
-	ih.ServeHTTP(w1, r1, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+	ih.ServeHTTP(w1, r1)

 	// Test HTTP request (should be mapped to "_other")
 	r2 := httptest.NewRequest("GET", "http://unknown.com/", nil)
 	r2.Host = "unknown.com"
 	// No TLS field = HTTP request
 	w2 := httptest.NewRecorder()
-	ih.ServeHTTP(w2, r2, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+	ih.ServeHTTP(w2, r2)

 	// Check that HTTPS request gets real host, HTTP gets "_other"
 	expected := `
@@ -488,8 +480,102 @@ func TestMetricsHTTPSCatchAll(t *testing.T) {
 	}
 }

-type middlewareHandlerFunc func(http.ResponseWriter, *http.Request, Handler) error
+func TestMetricsInstrumentedRoute(t *testing.T) {
+	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
+	m := &Metrics{
+		init:        sync.Once{},
+		httpMetrics: &httpMetrics{},
+	}

-func (f middlewareHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, h Handler) error {
-	return f(w, r, h)
+	handlerErr := errors.New("oh noes")
+	response := []byte("hello world!")
+	innerHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+		if actual := testutil.ToFloat64(m.httpMetrics.requestInFlight); actual != 1.0 {
+			t.Errorf("Expected requestInFlight to be 1.0, got %v", actual)
+		}
+		if handlerErr == nil {
+			w.Write(response)
+		}
+		return handlerErr
+	})
+
+	ih := newMetricsInstrumentedRoute(ctx, "test_handler", innerHandler, m)
+
+	r := httptest.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	// Test with error
+	if actual := ih.ServeHTTP(w, r); actual != handlerErr {
+		t.Errorf("Expected error %v, got %v", handlerErr, actual)
+	}
+	if actual := testutil.ToFloat64(m.httpMetrics.requestInFlight); actual != 0.0 {
+		t.Errorf("Expected requestInFlight to be 0.0 after request, got %v", actual)
+	}
+	if actual := testutil.ToFloat64(m.httpMetrics.requestErrors); actual != 1.0 {
+		t.Errorf("Expected requestErrors to be 1.0, got %v", actual)
+	}
+
+	// Test without error
+	handlerErr = nil
+	w = httptest.NewRecorder()
+	if err := ih.ServeHTTP(w, r); err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func BenchmarkMetricsInstrumentedRoute(b *testing.B) {
+	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
+	m := &Metrics{
+		init:        sync.Once{},
+		httpMetrics: &httpMetrics{},
+	}
+
+	noopHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+		w.Write([]byte("ok"))
+		return nil
+	})
+
+	ih := newMetricsInstrumentedRoute(ctx, "bench_handler", noopHandler, m)
+
+	r := httptest.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		ih.ServeHTTP(w, r)
+	}
+}
+
+// BenchmarkSingleRouteMetrics simulates the new behavior where metrics
+// are collected once for the entire route.
+func BenchmarkSingleRouteMetrics(b *testing.B) {
+	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
+	m := &Metrics{
+		init:        sync.Once{},
+		httpMetrics: &httpMetrics{},
+	}
+
+	// Build a chain of 5 plain middleware handlers (no per-handler metrics)
+	var next Handler = HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+		return nil
+	})
+	for i := 0; i < 5; i++ {
+		capturedNext := next
+		next = HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+			return capturedNext.ServeHTTP(w, r)
+		})
+	}
+
+	// Wrap the entire chain with a single route-level metrics handler
+	ih := newMetricsInstrumentedRoute(ctx, "handler", next, m)
+
+	r := httptest.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		ih.ServeHTTP(w, r)
+	}
 }
@@ -420,7 +420,16 @@ func getReqTLSReplacement(req *http.Request, key string) (any, bool) {
 	if strings.HasPrefix(field, "client.") {
 		cert := getTLSPeerCert(req.TLS)
 		if cert == nil {
-			return nil, false
+			// Instead of returning (nil, false) here, we set it to a dummy
+			// value to fix #7530. This way, even if there is no client cert,
+			// evaluating placeholders with ReplaceKnown() will still remove
+			// the placeholder, which would be expected. It is not expected
+			// for the placeholder to sometimes get removed based on whether
+			// the client presented a cert. We also do not return true here
+			// because we probably should remain accurate about whether a
+			// placeholder is, in fact, known or not.
+			// (This allocation may be slightly inefficient.)
+			cert = new(x509.Certificate)
 		}

 		// subject alternate names (SANs)
@@ -73,8 +73,9 @@ func (adminUpstreams) handleUpstreams(w http.ResponseWriter, r *http.Request) er

 	// Collect the results to respond with
 	results := []upstreamStatus{}
+	knownHosts := make(map[string]struct{})

-	// Iterate over the upstream pool (needs to be fast)
+	// Iterate over the static upstream pool (needs to be fast)
 	var rangeErr error
 	hosts.Range(func(key, val any) bool {
 		address, ok := key.(string)
@@ -95,6 +96,8 @@ func (adminUpstreams) handleUpstreams(w http.ResponseWriter, r *http.Request) er
 			return false
 		}

+		knownHosts[address] = struct{}{}
+
 		results = append(results, upstreamStatus{
 			Address:     address,
 			NumRequests: upstream.NumRequests(),
@@ -103,11 +106,32 @@ func (adminUpstreams) handleUpstreams(w http.ResponseWriter, r *http.Request) er
 		return true
 	})

-	// If an error happened during the range, return it
+	currentInFlight := getInFlightRequests()
+	for address, count := range currentInFlight {
+		if _, exists := knownHosts[address]; !exists && count > 0 {
+			results = append(results, upstreamStatus{
+				Address:     address,
+				NumRequests: int(count),
+				Fails:       0,
+			})
+		}
+	}
+
 	if rangeErr != nil {
 		return rangeErr
 	}

+	// Also include dynamic upstreams
+	dynamicHostsMu.RLock()
+	for address, entry := range dynamicHosts {
+		results = append(results, upstreamStatus{
+			Address:     address,
+			NumRequests: entry.host.NumRequests(),
+			Fails:       entry.host.Fails(),
+		})
+	}
+	dynamicHostsMu.RUnlock()
+
 	err := enc.Encode(results)
 	if err != nil {
 		return caddy.APIError{
@@ -0,0 +1,275 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package reverseproxy
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+// adminHandlerFixture sets up the global host state for an admin endpoint test
+// and returns a cleanup function that must be deferred by the caller.
+//
+// staticAddrs are inserted into the UsagePool (as a static upstream would be).
+// dynamicAddrs are inserted into the dynamicHosts map (as a dynamic upstream would be).
+func adminHandlerFixture(t *testing.T, staticAddrs, dynamicAddrs []string) func() {
+	t.Helper()
+
+	for _, addr := range staticAddrs {
+		u := &Upstream{Dial: addr}
+		u.fillHost()
+	}
+
+	dynamicHostsMu.Lock()
+	for _, addr := range dynamicAddrs {
+		dynamicHosts[addr] = dynamicHostEntry{host: new(Host), lastSeen: time.Now()}
+	}
+	dynamicHostsMu.Unlock()
+
+	return func() {
+		// Remove static entries from the UsagePool.
+		for _, addr := range staticAddrs {
+			_, _ = hosts.Delete(addr)
+		}
+		// Remove dynamic entries.
+		dynamicHostsMu.Lock()
+		for _, addr := range dynamicAddrs {
+			delete(dynamicHosts, addr)
+		}
+		dynamicHostsMu.Unlock()
+	}
+}
+
+// callAdminUpstreams fires a GET against handleUpstreams and returns the
+// decoded response body.
+func callAdminUpstreams(t *testing.T) []upstreamStatus {
+	t.Helper()
+	req := httptest.NewRequest(http.MethodGet, "/reverse_proxy/upstreams", nil)
+	w := httptest.NewRecorder()
+
+	handler := adminUpstreams{}
+	if err := handler.handleUpstreams(w, req); err != nil {
+		t.Fatalf("handleUpstreams returned unexpected error: %v", err)
+	}
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+	if ct := w.Header().Get("Content-Type"); ct != "application/json" {
+		t.Fatalf("expected Content-Type application/json, got %q", ct)
+	}
+
+	var results []upstreamStatus
+	if err := json.NewDecoder(w.Body).Decode(&results); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+	return results
+}
+
+// resultsByAddress indexes a slice of upstreamStatus by address for easier
+// lookup in assertions.
+func resultsByAddress(statuses []upstreamStatus) map[string]upstreamStatus {
+	m := make(map[string]upstreamStatus, len(statuses))
+	for _, s := range statuses {
+		m[s.Address] = s
+	}
+	return m
+}
+
+// TestAdminUpstreamsMethodNotAllowed verifies that non-GET methods are rejected.
+func TestAdminUpstreamsMethodNotAllowed(t *testing.T) {
+	for _, method := range []string{http.MethodPost, http.MethodPut, http.MethodDelete} {
+		req := httptest.NewRequest(method, "/reverse_proxy/upstreams", nil)
+		w := httptest.NewRecorder()
+		err := (adminUpstreams{}).handleUpstreams(w, req)
+		if err == nil {
+			t.Errorf("method %s: expected an error, got nil", method)
+			continue
+		}
+		apiErr, ok := err.(interface{ HTTPStatus() int })
+		if !ok {
+			// caddy.APIError stores the code in HTTPStatus field, access via the
+			// exported interface it satisfies indirectly; just check non-nil.
+			continue
+		}
+		if code := apiErr.HTTPStatus(); code != http.StatusMethodNotAllowed {
+			t.Errorf("method %s: expected 405, got %d", method, code)
+		}
+	}
+}
+
+// TestAdminUpstreamsEmpty verifies that an empty response is valid JSON when
+// no upstreams are registered.
+func TestAdminUpstreamsEmpty(t *testing.T) {
+	resetDynamicHosts()
+
+	results := callAdminUpstreams(t)
+	if results == nil {
+		t.Error("expected non-nil (empty) slice, got nil")
+	}
+	if len(results) != 0 {
+		t.Errorf("expected 0 results with empty pools, got %d", len(results))
+	}
+}
+
+// TestAdminUpstreamsStaticOnly verifies that static upstreams (from the
+// UsagePool) appear in the response with correct addresses.
+func TestAdminUpstreamsStaticOnly(t *testing.T) {
+	resetDynamicHosts()
+	cleanup := adminHandlerFixture(t,
+		[]string{"10.0.0.1:80", "10.0.0.2:80"},
+		nil,
+	)
+	defer cleanup()
+
+	results := callAdminUpstreams(t)
+	byAddr := resultsByAddress(results)
+
+	for _, addr := range []string{"10.0.0.1:80", "10.0.0.2:80"} {
+		if _, ok := byAddr[addr]; !ok {
+			t.Errorf("expected static upstream %q in response", addr)
+		}
+	}
+	if len(results) != 2 {
+		t.Errorf("expected exactly 2 results, got %d", len(results))
+	}
+}
+
+// TestAdminUpstreamsDynamicOnly verifies that dynamic upstreams (from
+// dynamicHosts) appear in the response with correct addresses.
+func TestAdminUpstreamsDynamicOnly(t *testing.T) {
+	resetDynamicHosts()
+	cleanup := adminHandlerFixture(t,
+		nil,
+		[]string{"10.0.1.1:80", "10.0.1.2:80"},
+	)
+	defer cleanup()
+
+	results := callAdminUpstreams(t)
+	byAddr := resultsByAddress(results)
+
+	for _, addr := range []string{"10.0.1.1:80", "10.0.1.2:80"} {
+		if _, ok := byAddr[addr]; !ok {
+			t.Errorf("expected dynamic upstream %q in response", addr)
+		}
+	}
+	if len(results) != 2 {
+		t.Errorf("expected exactly 2 results, got %d", len(results))
+	}
+}
+
+// TestAdminUpstreamsBothPools verifies that static and dynamic upstreams are
+// both present in the same response and that there is no overlap or omission.
+func TestAdminUpstreamsBothPools(t *testing.T) {
+	resetDynamicHosts()
+	cleanup := adminHandlerFixture(t,
+		[]string{"10.0.2.1:80"},
+		[]string{"10.0.2.2:80"},
+	)
+	defer cleanup()
+
+	results := callAdminUpstreams(t)
+	if len(results) != 2 {
+		t.Fatalf("expected 2 results (1 static + 1 dynamic), got %d", len(results))
+	}
+
+	byAddr := resultsByAddress(results)
+	if _, ok := byAddr["10.0.2.1:80"]; !ok {
+		t.Error("static upstream missing from response")
+	}
+	if _, ok := byAddr["10.0.2.2:80"]; !ok {
+		t.Error("dynamic upstream missing from response")
+	}
+}
+
+// TestAdminUpstreamsNoOverlapBetweenPools verifies that an address registered
+// only as a static upstream does not also appear as a dynamic entry, and
+// vice-versa.
+func TestAdminUpstreamsNoOverlapBetweenPools(t *testing.T) {
+	resetDynamicHosts()
+	cleanup := adminHandlerFixture(t,
+		[]string{"10.0.3.1:80"},
+		[]string{"10.0.3.2:80"},
+	)
+	defer cleanup()
+
+	results := callAdminUpstreams(t)
+	seen := make(map[string]int)
+	for _, r := range results {
+		seen[r.Address]++
+	}
+	for addr, count := range seen {
+		if count > 1 {
+			t.Errorf("address %q appeared %d times; expected exactly once", addr, count)
+		}
+	}
+}
+
+// TestAdminUpstreamsReportsFailCounts verifies that fail counts accumulated on
+// a dynamic upstream's Host are reflected in the response.
+func TestAdminUpstreamsReportsFailCounts(t *testing.T) {
+	resetDynamicHosts()
+
+	const addr = "10.0.4.1:80"
+	h := new(Host)
+	_ = h.countFail(3)
+
+	dynamicHostsMu.Lock()
+	dynamicHosts[addr] = dynamicHostEntry{host: h, lastSeen: time.Now()}
+	dynamicHostsMu.Unlock()
+	defer func() {
+		dynamicHostsMu.Lock()
+		delete(dynamicHosts, addr)
+		dynamicHostsMu.Unlock()
+	}()
+
+	results := callAdminUpstreams(t)
+	byAddr := resultsByAddress(results)
+
+	status, ok := byAddr[addr]
+	if !ok {
+		t.Fatalf("expected %q in response", addr)
+	}
+	if status.Fails != 3 {
+		t.Errorf("expected Fails=3, got %d", status.Fails)
+	}
+}
+
+// TestAdminUpstreamsReportsNumRequests verifies that the active request count
+// for a static upstream is reflected in the response.
+func TestAdminUpstreamsReportsNumRequests(t *testing.T) {
+	resetDynamicHosts()
+
+	const addr = "10.0.4.2:80"
+	u := &Upstream{Dial: addr}
+	u.fillHost()
+	defer func() { _, _ = hosts.Delete(addr) }()
+
+	_ = u.Host.countRequest(2)
+	defer func() { _ = u.Host.countRequest(-2) }()
+
+	results := callAdminUpstreams(t)
+	byAddr := resultsByAddress(results)
+
+	status, ok := byAddr[addr]
+	if !ok {
+		t.Fatalf("expected %q in response", addr)
+	}
+	if status.NumRequests != 2 {
+		t.Errorf("expected NumRequests=2, got %d", status.NumRequests)
+	}
+}
@@ -0,0 +1,345 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package reverseproxy
+
+import (
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/caddyserver/caddy/v2"
+)
+
+// resetDynamicHosts clears global dynamic host state between tests.
+func resetDynamicHosts() {
+	dynamicHostsMu.Lock()
+	dynamicHosts = make(map[string]dynamicHostEntry)
+	dynamicHostsMu.Unlock()
+	// Reset the Once so cleanup goroutine tests can re-trigger if needed.
+	dynamicHostsCleanerOnce = sync.Once{}
+}
+
+// TestFillDynamicHostCreatesEntry verifies that calling fillDynamicHost on a
+// new address inserts an entry into dynamicHosts and assigns a non-nil Host.
+func TestFillDynamicHostCreatesEntry(t *testing.T) {
+	resetDynamicHosts()
+
+	u := &Upstream{Dial: "192.0.2.1:80"}
+	u.fillDynamicHost()
+
+	if u.Host == nil {
+		t.Fatal("expected Host to be set after fillDynamicHost")
+	}
+
+	dynamicHostsMu.RLock()
+	entry, ok := dynamicHosts["192.0.2.1:80"]
+	dynamicHostsMu.RUnlock()
+
+	if !ok {
+		t.Fatal("expected entry in dynamicHosts map")
+	}
+	if entry.host != u.Host {
+		t.Error("dynamicHosts entry host should be the same pointer assigned to Upstream.Host")
+	}
+	if entry.lastSeen.IsZero() {
+		t.Error("expected lastSeen to be set")
+	}
+}
+
+// TestFillDynamicHostReusesSameHost verifies that two calls for the same address
+// return the exact same *Host pointer so that state (e.g. fail counts) is shared.
+func TestFillDynamicHostReusesSameHost(t *testing.T) {
+	resetDynamicHosts()
+
+	u1 := &Upstream{Dial: "192.0.2.2:80"}
+	u1.fillDynamicHost()
+
+	u2 := &Upstream{Dial: "192.0.2.2:80"}
+	u2.fillDynamicHost()
+
+	if u1.Host != u2.Host {
+		t.Error("expected both upstreams to share the same *Host pointer")
+	}
+}
+
+// TestFillDynamicHostUpdatesLastSeen verifies that a second call for the same
+// address advances the lastSeen timestamp.
+func TestFillDynamicHostUpdatesLastSeen(t *testing.T) {
+	resetDynamicHosts()
+
+	u := &Upstream{Dial: "192.0.2.3:80"}
+	u.fillDynamicHost()
+
+	dynamicHostsMu.RLock()
+	first := dynamicHosts["192.0.2.3:80"].lastSeen
+	dynamicHostsMu.RUnlock()
+
+	// Ensure measurable time passes.
+	time.Sleep(2 * time.Millisecond)
+
+	u2 := &Upstream{Dial: "192.0.2.3:80"}
+	u2.fillDynamicHost()
+
+	dynamicHostsMu.RLock()
+	second := dynamicHosts["192.0.2.3:80"].lastSeen
+	dynamicHostsMu.RUnlock()
+
+	if !second.After(first) {
+		t.Error("expected lastSeen to be updated on second fillDynamicHost call")
+	}
+}
+
+// TestFillDynamicHostIndependentAddresses verifies that different addresses get
+// independent Host entries.
+func TestFillDynamicHostIndependentAddresses(t *testing.T) {
+	resetDynamicHosts()
+
+	u1 := &Upstream{Dial: "192.0.2.4:80"}
+	u1.fillDynamicHost()
+
+	u2 := &Upstream{Dial: "192.0.2.5:80"}
+	u2.fillDynamicHost()
+
+	if u1.Host == u2.Host {
+		t.Error("different addresses should have different *Host entries")
+	}
+}
+
+// TestFillDynamicHostPreservesFailCount verifies that fail counts on a dynamic
+// host survive across multiple fillDynamicHost calls (simulating sequential
+// requests), which is the core behaviour fixed by this change.
+func TestFillDynamicHostPreservesFailCount(t *testing.T) {
+	resetDynamicHosts()
+
+	// First "request": provision and record a failure.
+	u1 := &Upstream{Dial: "192.0.2.6:80"}
+	u1.fillDynamicHost()
+	_ = u1.Host.countFail(1)
+
+	if u1.Host.Fails() != 1 {
+		t.Fatalf("expected 1 fail, got %d", u1.Host.Fails())
+	}
+
+	// Second "request": provision the same address again (new *Upstream, same address).
+	u2 := &Upstream{Dial: "192.0.2.6:80"}
+	u2.fillDynamicHost()
+
+	if u2.Host.Fails() != 1 {
+		t.Errorf("expected fail count to persist across fillDynamicHost calls, got %d", u2.Host.Fails())
+	}
+}
+
+// TestProvisionUpstreamDynamic verifies that provisionUpstream with dynamic=true
+// uses fillDynamicHost (not the UsagePool) and sets healthCheckPolicy /
+// MaxRequests correctly from handler config.
+func TestProvisionUpstreamDynamic(t *testing.T) {
+	resetDynamicHosts()
+
+	passive := &PassiveHealthChecks{
+		FailDuration:          caddy.Duration(10 * time.Second),
+		MaxFails:              3,
+		UnhealthyRequestCount: 5,
+	}
+	h := Handler{
+		HealthChecks: &HealthChecks{
+			Passive: passive,
+		},
+	}
+
+	u := &Upstream{Dial: "192.0.2.7:80"}
+	h.provisionUpstream(u, true)
+
+	if u.Host == nil {
+		t.Fatal("Host should be set after provisionUpstream")
+	}
+	if u.healthCheckPolicy != passive {
+		t.Error("healthCheckPolicy should point to the handler's PassiveHealthChecks")
+	}
+	if u.MaxRequests != 5 {
+		t.Errorf("expected MaxRequests=5 from UnhealthyRequestCount, got %d", u.MaxRequests)
+	}
+
+	// Must be in dynamicHosts, not in the static UsagePool.
+	dynamicHostsMu.RLock()
+	_, inDynamic := dynamicHosts["192.0.2.7:80"]
+	dynamicHostsMu.RUnlock()
+	if !inDynamic {
+		t.Error("dynamic upstream should be stored in dynamicHosts")
+	}
+	_, inPool := hosts.References("192.0.2.7:80")
+	if inPool {
+		t.Error("dynamic upstream should NOT be stored in the static UsagePool")
+	}
+}
+
+// TestProvisionUpstreamStatic verifies that provisionUpstream with dynamic=false
+// uses the UsagePool and does NOT insert into dynamicHosts.
+func TestProvisionUpstreamStatic(t *testing.T) {
+	resetDynamicHosts()
+
+	h := Handler{}
+
+	u := &Upstream{Dial: "192.0.2.8:80"}
+	h.provisionUpstream(u, false)
+
+	if u.Host == nil {
+		t.Fatal("Host should be set after provisionUpstream")
+	}
+
+	refs, inPool := hosts.References("192.0.2.8:80")
+	if !inPool {
+		t.Error("static upstream should be in the UsagePool")
+	}
+	if refs != 1 {
+		t.Errorf("expected ref count 1, got %d", refs)
+	}
+
+	dynamicHostsMu.RLock()
+	_, inDynamic := dynamicHosts["192.0.2.8:80"]
+	dynamicHostsMu.RUnlock()
+	if inDynamic {
+		t.Error("static upstream should NOT be in dynamicHosts")
+	}
+
+	// Clean up the pool entry we just added.
+	_, _ = hosts.Delete("192.0.2.8:80")
+}
+
+// TestDynamicHostHealthyConsultsFails verifies the end-to-end passive health
+// check path: after enough failures are recorded against a dynamic upstream's
+// shared *Host, Healthy() returns false for a newly provisioned *Upstream with
+// the same address.
+func TestDynamicHostHealthyConsultsFails(t *testing.T) {
+	resetDynamicHosts()
+
+	passive := &PassiveHealthChecks{
+		FailDuration: caddy.Duration(time.Minute),
+		MaxFails:     2,
+	}
+	h := Handler{
+		HealthChecks: &HealthChecks{Passive: passive},
+	}
+
+	// First request: provision and record two failures.
+	u1 := &Upstream{Dial: "192.0.2.9:80"}
+	h.provisionUpstream(u1, true)
+
+	_ = u1.Host.countFail(1)
+	_ = u1.Host.countFail(1)
+
+	// Second request: fresh *Upstream, same address.
+	u2 := &Upstream{Dial: "192.0.2.9:80"}
+	h.provisionUpstream(u2, true)
+
+	if u2.Healthy() {
+		t.Error("upstream should be unhealthy after MaxFails failures have been recorded against its shared Host")
+	}
+}
+
+// TestDynamicHostCleanupEvictsStaleEntries verifies that the cleanup sweep
+// removes entries whose lastSeen is older than dynamicHostIdleExpiry.
+func TestDynamicHostCleanupEvictsStaleEntries(t *testing.T) {
+	resetDynamicHosts()
+
+	const addr = "192.0.2.10:80"
+
+	// Insert an entry directly with a lastSeen far in the past.
+	dynamicHostsMu.Lock()
+	dynamicHosts[addr] = dynamicHostEntry{
+		host:     new(Host),
+		lastSeen: time.Now().Add(-2 * dynamicHostIdleExpiry),
+	}
+	dynamicHostsMu.Unlock()
+
+	// Run the cleanup logic inline (same logic as the goroutine).
+	dynamicHostsMu.Lock()
+	for a, entry := range dynamicHosts {
+		if time.Since(entry.lastSeen) > dynamicHostIdleExpiry {
+			delete(dynamicHosts, a)
+		}
+	}
+	dynamicHostsMu.Unlock()
+
+	dynamicHostsMu.RLock()
+	_, stillPresent := dynamicHosts[addr]
+	dynamicHostsMu.RUnlock()
+
+	if stillPresent {
+		t.Error("stale dynamic host entry should have been evicted by cleanup sweep")
+	}
+}
+
+// TestDynamicHostCleanupRetainsFreshEntries verifies that the cleanup sweep
+// keeps entries whose lastSeen is within dynamicHostIdleExpiry.
+func TestDynamicHostCleanupRetainsFreshEntries(t *testing.T) {
+	resetDynamicHosts()
+
+	const addr = "192.0.2.11:80"
+
+	dynamicHostsMu.Lock()
+	dynamicHosts[addr] = dynamicHostEntry{
+		host:     new(Host),
+		lastSeen: time.Now(),
+	}
+	dynamicHostsMu.Unlock()
+
+	// Run the cleanup logic inline.
+	dynamicHostsMu.Lock()
+	for a, entry := range dynamicHosts {
+		if time.Since(entry.lastSeen) > dynamicHostIdleExpiry {
+			delete(dynamicHosts, a)
+		}
+	}
+	dynamicHostsMu.Unlock()
+
+	dynamicHostsMu.RLock()
+	_, stillPresent := dynamicHosts[addr]
+	dynamicHostsMu.RUnlock()
+
+	if !stillPresent {
+		t.Error("fresh dynamic host entry should be retained by cleanup sweep")
+	}
+}
+
+// TestDynamicHostConcurrentFillHost verifies that concurrent calls to
+// fillDynamicHost for the same address all get the same *Host pointer and
+// don't race (run with -race).
+func TestDynamicHostConcurrentFillHost(t *testing.T) {
+	resetDynamicHosts()
+
+	const addr = "192.0.2.12:80"
+	const goroutines = 50
+
+	var wg sync.WaitGroup
+	hosts := make([]*Host, goroutines)
+
+	for i := range goroutines {
+		wg.Add(1)
+		go func(idx int) {
+			defer wg.Done()
+			u := &Upstream{Dial: addr}
+			u.fillDynamicHost()
+			hosts[idx] = u.Host
+		}(i)
+	}
+	wg.Wait()
+
+	first := hosts[0]
+	for i, h := range hosts {
+		if h != first {
+			t.Errorf("goroutine %d got a different *Host pointer; expected all to share the same entry", i)
+		}
+	}
+}
@@ -27,7 +27,7 @@ import (
 	"fmt"
 	"io"
 	"log"
-	"math/rand"
+	"math/rand/v2"
 	"net"
 	"net/http"
 	"net/http/fcgi"
@@ -197,7 +197,7 @@ func generateRandFile(size int) (p string, m string) {
 	h := md5.New()
 	for i := 0; i < size/16; i++ {
 		buf := make([]byte, 16)
-		binary.PutVarint(buf, rand.Int63())
+		binary.PutVarint(buf, rand.Int64())
 		if _, err := fo.Write(buf); err != nil {
 			log.Printf("[ERROR] failed to write buffer: %v\n", err)
 		}
@@ -16,6 +16,7 @@ package fastcgi

 import (
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -23,9 +24,12 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"

 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
+	"golang.org/x/text/language"
+	"golang.org/x/text/search"

 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
@@ -33,7 +37,11 @@ import (
 	"github.com/caddyserver/caddy/v2/modules/caddytls"
 )

-var noopLogger = zap.NewNop()
+var (
+	ErrInvalidSplitPath = errors.New("split path contains non-ASCII characters")
+
+	noopLogger = zap.NewNop()
+)

 func init() {
 	caddy.RegisterModule(Transport{})
@@ -50,6 +58,9 @@ type Transport struct {
 	// actual resource (CGI script) name, and the second piece will be set to
 	// PATH_INFO for the CGI script to use.
 	//
+	// Split paths can only contain ASCII characters.
+	// Comparison is case-insensitive.
+	//
 	// Future enhancements should be careful to avoid CVE-2019-11043,
 	// which can be mitigated with use of a try_files-like behavior
 	// that 404s if the fastcgi path info is not found.
@@ -109,6 +120,28 @@ func (t *Transport) Provision(ctx caddy.Context) error {
 		t.DialTimeout = caddy.Duration(3 * time.Second)
 	}

+	var b strings.Builder
+
+	for i, split := range t.SplitPath {
+		b.Grow(len(split))
+
+		for j := 0; j < len(split); j++ {
+			c := split[j]
+			if c >= utf8.RuneSelf {
+				return ErrInvalidSplitPath
+			}
+
+			if 'A' <= c && c <= 'Z' {
+				b.WriteByte(c + 'a' - 'A')
+			} else {
+				b.WriteByte(c)
+			}
+		}
+
+		t.SplitPath[i] = b.String()
+		b.Reset()
+	}
+
 	return nil
 }

@@ -385,8 +418,15 @@ func (t Transport) buildEnv(r *http.Request) (envVars, error) {
 	return env, nil
 }

+var splitSearchNonASCII = search.New(language.Und, search.IgnoreCase)
+
 // splitPos returns the index where path should
 // be split based on t.SplitPath.
+//
+// example: if splitPath is [".php"]
+// "/path/to/script.php/some/path": ("/path/to/script.php", "/some/path")
+//
+// Adapted from FrankenPHP's code (copyright 2026 Kévin Dunglas, MIT license)
 func (t Transport) splitPos(path string) int {
 	// TODO: from v1...
 	// if httpserver.CaseSensitivePath {
@@ -396,12 +436,54 @@ func (t Transport) splitPos(path string) int {
 		return 0
 	}

-	lowerPath := strings.ToLower(path)
+	pathLen := len(path)
+
+	// We are sure that split strings are all ASCII-only and lower-case because of validation and normalization in Provision().
 	for _, split := range t.SplitPath {
-		if idx := strings.Index(lowerPath, strings.ToLower(split)); idx > -1 {
-			return idx + len(split)
+		splitLen := len(split)
+
+		for i := range pathLen {
+			if path[i] >= utf8.RuneSelf {
+				if _, end := splitSearchNonASCII.IndexString(path, split); end > -1 {
+					return end
+				}
+
+				break
+			}
+
+			if i+splitLen > pathLen {
+				continue
+			}
+
+			match := true
+			for j := range splitLen {
+				c := path[i+j]
+
+				if c >= utf8.RuneSelf {
+					if _, end := splitSearchNonASCII.IndexString(path, split); end > -1 {
+						return end
+					}
+
+					break
+				}
+
+				if 'A' <= c && c <= 'Z' {
+					c += 'a' - 'A'
+				}
+
+				if c != split[j] {
+					match = false
+
+					break
+				}
+			}
+
+			if match {
+				return i + splitLen
+			}
 		}
 	}
+
 	return -1
 }

@@ -0,0 +1,246 @@
+package fastcgi
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/caddyserver/caddy/v2"
+)
+
+func TestProvisionSplitPath(t *testing.T) {
+	tests := []struct {
+		name          string
+		splitPath     []string
+		wantErr       error
+		wantSplitPath []string
+	}{
+		{
+			name:          "valid lowercase split path",
+			splitPath:     []string{".php"},
+			wantErr:       nil,
+			wantSplitPath: []string{".php"},
+		},
+		{
+			name:          "valid uppercase split path normalized",
+			splitPath:     []string{".PHP"},
+			wantErr:       nil,
+			wantSplitPath: []string{".php"},
+		},
+		{
+			name:          "valid mixed case split path normalized",
+			splitPath:     []string{".PhP", ".PHTML"},
+			wantErr:       nil,
+			wantSplitPath: []string{".php", ".phtml"},
+		},
+		{
+			name:          "empty split path",
+			splitPath:     []string{},
+			wantErr:       nil,
+			wantSplitPath: []string{},
+		},
+		{
+			name:      "non-ASCII character in split path rejected",
+			splitPath: []string{".php", ".Ⱥphp"},
+			wantErr:   ErrInvalidSplitPath,
+		},
+		{
+			name:      "unicode character in split path rejected",
+			splitPath: []string{".phpⱥ"},
+			wantErr:   ErrInvalidSplitPath,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tr := Transport{SplitPath: tt.splitPath}
+			err := tr.Provision(caddy.Context{})
+
+			if tt.wantErr != nil {
+				require.ErrorIs(t, err, tt.wantErr)
+
+				return
+			}
+
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantSplitPath, tr.SplitPath)
+		})
+	}
+}
+
+func TestSplitPos(t *testing.T) {
+	tests := []struct {
+		name      string
+		path      string
+		splitPath []string
+		wantPos   int
+	}{
+		{
+			name:      "simple php extension",
+			path:      "/path/to/script.php",
+			splitPath: []string{".php"},
+			wantPos:   19,
+		},
+		{
+			name:      "php extension with path info",
+			path:      "/path/to/script.php/some/path",
+			splitPath: []string{".php"},
+			wantPos:   19,
+		},
+		{
+			name:      "case insensitive match",
+			path:      "/path/to/script.PHP",
+			splitPath: []string{".php"},
+			wantPos:   19,
+		},
+		{
+			name:      "mixed case match",
+			path:      "/path/to/script.PhP/info",
+			splitPath: []string{".php"},
+			wantPos:   19,
+		},
+		{
+			name:      "no match",
+			path:      "/path/to/script.txt",
+			splitPath: []string{".php"},
+			wantPos:   -1,
+		},
+		{
+			name:      "empty split path",
+			path:      "/path/to/script.php",
+			splitPath: []string{},
+			wantPos:   0,
+		},
+		{
+			name:      "multiple split paths first match",
+			path:      "/path/to/script.php",
+			splitPath: []string{".php", ".phtml"},
+			wantPos:   19,
+		},
+		{
+			name:      "multiple split paths second match",
+			path:      "/path/to/script.phtml",
+			splitPath: []string{".php", ".phtml"},
+			wantPos:   21,
+		},
+		// Unicode case-folding tests (security fix for GHSA-g966-83w7-6w38)
+		// U+023A (Ⱥ) lowercases to U+2C65 (ⱥ), which has different UTF-8 byte length
+		// Ⱥ: 2 bytes (C8 BA), ⱥ: 3 bytes (E2 B1 A5)
+		{
+			name:      "unicode path with case-folding length expansion",
+			path:      "/ȺȺȺȺshell.php",
+			splitPath: []string{".php"},
+			wantPos:   18, // correct position in original string
+		},
+		{
+			name:      "unicode path with extension after expansion chars",
+			path:      "/ȺȺȺȺshell.php/path/info",
+			splitPath: []string{".php"},
+			wantPos:   18,
+		},
+		{
+			name:      "unicode in filename with multiple php occurrences",
+			path:      "/ȺȺȺȺshell.php.txt.php",
+			splitPath: []string{".php"},
+			wantPos:   18, // should match first .php, not be confused by byte offset shift
+		},
+		{
+			name:      "unicode case insensitive extension",
+			path:      "/ȺȺȺȺshell.PHP",
+			splitPath: []string{".php"},
+			wantPos:   18,
+		},
+		{
+			name:      "unicode in middle of path",
+			path:      "/path/Ⱥtest/script.php",
+			splitPath: []string{".php"},
+			wantPos:   23, // Ⱥ is 2 bytes, so path is 23 bytes total, .php ends at byte 23
+		},
+		{
+			name:      "unicode only in directory not filename",
+			path:      "/Ⱥ/script.php",
+			splitPath: []string{".php"},
+			wantPos:   14,
+		},
+		// Additional Unicode characters that expand when lowercased
+		// U+0130 (İ - Turkish capital I with dot) lowercases to U+0069 + U+0307
+		{
+			name:      "turkish capital I with dot",
+			path:      "/İtest.php",
+			splitPath: []string{".php"},
+			wantPos:   11,
+		},
+		// Ensure standard ASCII still works correctly
+		{
+			name:      "ascii only path with case variation",
+			path:      "/PATH/TO/SCRIPT.PHP/INFO",
+			splitPath: []string{".php"},
+			wantPos:   19,
+		},
+		{
+			name:      "path at root",
+			path:      "/index.php",
+			splitPath: []string{".php"},
+			wantPos:   10,
+		},
+		{
+			name:      "extension in middle of filename",
+			path:      "/test.php.bak",
+			splitPath: []string{".php"},
+			wantPos:   9,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotPos := Transport{SplitPath: tt.splitPath}.splitPos(tt.path)
+			assert.Equal(t, tt.wantPos, gotPos, "splitPos(%q, %v)", tt.path, tt.splitPath)
+
+			// Verify that the split produces valid substrings
+			if gotPos > 0 && gotPos <= len(tt.path) {
+				scriptName := tt.path[:gotPos]
+				pathInfo := tt.path[gotPos:]
+
+				// The script name should end with one of the split extensions (case-insensitive)
+				hasValidEnding := false
+				for _, split := range tt.splitPath {
+					if strings.HasSuffix(strings.ToLower(scriptName), split) {
+						hasValidEnding = true
+						break
+					}
+				}
+				assert.True(t, hasValidEnding, "script name %q should end with one of %v", scriptName, tt.splitPath)
+
+				// Original path should be reconstructable
+				assert.Equal(t, tt.path, scriptName+pathInfo, "path should be reconstructable from split parts")
+			}
+		})
+	}
+}
+
+// TestSplitPosUnicodeSecurityRegression specifically tests the vulnerability
+// described in GHSA-g966-83w7-6w38 where Unicode case-folding caused
+// incorrect SCRIPT_NAME/PATH_INFO splitting
+func TestSplitPosUnicodeSecurityRegression(t *testing.T) {
+	// U+023A: Ⱥ (UTF-8: C8 BA). Lowercase is ⱥ (UTF-8: E2 B1 A5), longer in bytes.
+	path := "/ȺȺȺȺshell.php.txt.php"
+	split := []string{".php"}
+
+	pos := Transport{SplitPath: split}.splitPos(path)
+
+	// The vulnerable code would return 22 (computed on lowercased string)
+	// The correct code should return 18 (position in original string)
+	expectedPos := strings.Index(path, ".php") + len(".php")
+	assert.Equal(t, expectedPos, pos, "split position should match first .php in original string")
+	assert.Equal(t, 18, pos, "split position should be 18, not 22")
+
+	if pos > 0 && pos <= len(path) {
+		scriptName := path[:pos]
+		pathInfo := path[pos:]
+
+		assert.Equal(t, "/ȺȺȺȺshell.php", scriptName, "script name should be the path up to first .php")
+		assert.Equal(t, ".txt.php", pathInfo, "path info should be the remainder after first .php")
+	}
+}
@@ -208,6 +208,24 @@ func parseCaddyfile(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error)
 	for _, from := range sortedHeadersToCopy {
 		to := http.CanonicalHeaderKey(headersToCopy[from])
 		placeholderName := "http.reverse_proxy.header." + http.CanonicalHeaderKey(from)
+
+		// Always delete the client-supplied header before conditionally setting
+		// it from the auth response. Without this, a client that pre-supplies a
+		// header listed in copy_headers can inject arbitrary values when the auth
+		// service does not return that header: the MatchNot guard below would
+		// skip the Set entirely, leaving the original client-controlled value
+		// intact and forwarding it to the backend.
+		copyHeaderRoutes = append(copyHeaderRoutes, caddyhttp.Route{
+			HandlersRaw: []json.RawMessage{caddyconfig.JSONModuleObject(
+				&headers.Handler{
+					Request: &headers.HeaderOps{
+						Delete: []string{to},
+					},
+				},
+				"handler", "headers", nil,
+			)},
+		})
+
 		handler := &headers.Handler{
 			Request: &headers.HeaderOps{
 				Set: http.Header{
@@ -32,3 +32,96 @@ func TestAddForwardedHeadersNonIP(t *testing.T) {
 		t.Errorf("expected no error for non-IP address, got: %v", err)
 	}
 }
+
+func TestAddForwardedHeaders_UnixSocketTrusted(t *testing.T) {
+	h := Handler{}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "@"
+	req.Header.Set("X-Forwarded-For", "1.2.3.4, 10.0.0.1")
+	req.Header.Set("X-Forwarded-Proto", "https")
+	req.Header.Set("X-Forwarded-Host", "original.example.com")
+
+	vars := map[string]interface{}{
+		caddyhttp.TrustedProxyVarKey: true,
+		caddyhttp.ClientIPVarKey:     "1.2.3.4",
+	}
+	ctx := context.WithValue(req.Context(), caddyhttp.VarsCtxKey, vars)
+	req = req.WithContext(ctx)
+
+	err := h.addForwardedHeaders(req)
+	if err != nil {
+		t.Fatalf("expected no error, got: %v", err)
+	}
+
+	if got := req.Header.Get("X-Forwarded-For"); got != "1.2.3.4, 10.0.0.1" {
+		t.Errorf("X-Forwarded-For = %q, want %q", got, "1.2.3.4, 10.0.0.1")
+	}
+	if got := req.Header.Get("X-Forwarded-Proto"); got != "https" {
+		t.Errorf("X-Forwarded-Proto = %q, want %q", got, "https")
+	}
+	if got := req.Header.Get("X-Forwarded-Host"); got != "original.example.com" {
+		t.Errorf("X-Forwarded-Host = %q, want %q", got, "original.example.com")
+	}
+}
+
+func TestAddForwardedHeaders_UnixSocketUntrusted(t *testing.T) {
+	h := Handler{}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "@"
+	req.Header.Set("X-Forwarded-For", "1.2.3.4")
+	req.Header.Set("X-Forwarded-Proto", "https")
+	req.Header.Set("X-Forwarded-Host", "spoofed.example.com")
+
+	vars := map[string]interface{}{
+		caddyhttp.TrustedProxyVarKey: false,
+		caddyhttp.ClientIPVarKey:     "",
+	}
+	ctx := context.WithValue(req.Context(), caddyhttp.VarsCtxKey, vars)
+	req = req.WithContext(ctx)
+
+	err := h.addForwardedHeaders(req)
+	if err != nil {
+		t.Fatalf("expected no error, got: %v", err)
+	}
+
+	if got := req.Header.Get("X-Forwarded-For"); got != "" {
+		t.Errorf("X-Forwarded-For should be deleted, got %q", got)
+	}
+	if got := req.Header.Get("X-Forwarded-Proto"); got != "" {
+		t.Errorf("X-Forwarded-Proto should be deleted, got %q", got)
+	}
+	if got := req.Header.Get("X-Forwarded-Host"); got != "" {
+		t.Errorf("X-Forwarded-Host should be deleted, got %q", got)
+	}
+}
+
+func TestAddForwardedHeaders_UnixSocketTrustedNoExistingHeaders(t *testing.T) {
+	h := Handler{}
+
+	req := httptest.NewRequest("GET", "http://example.com/", nil)
+	req.RemoteAddr = "@"
+
+	vars := map[string]interface{}{
+		caddyhttp.TrustedProxyVarKey: true,
+		caddyhttp.ClientIPVarKey:     "5.6.7.8",
+	}
+	ctx := context.WithValue(req.Context(), caddyhttp.VarsCtxKey, vars)
+	req = req.WithContext(ctx)
+
+	err := h.addForwardedHeaders(req)
+	if err != nil {
+		t.Fatalf("expected no error, got: %v", err)
+	}
+
+	if got := req.Header.Get("X-Forwarded-For"); got != "" {
+		t.Errorf("X-Forwarded-For should be empty when no prior XFF exists, got %q", got)
+	}
+	if got := req.Header.Get("X-Forwarded-Proto"); got != "http" {
+		t.Errorf("X-Forwarded-Proto = %q, want %q", got, "http")
+	}
+	if got := req.Header.Get("X-Forwarded-Host"); got != "example.com" {
+		t.Errorf("X-Forwarded-Host = %q, want %q", got, "example.com")
+	}
+}
@@ -359,6 +359,12 @@ func (h *Handler) doActiveHealthCheckForAllHosts() {
 				dialInfoUpstream = &Upstream{
 					Dial: h.HealthChecks.Active.Upstream,
 				}
+			} else if upstream.activeHealthCheckPort != 0 {
+				// health_port overrides the port; addr has already been updated
+				// with the health port, so use its address for dialing
+				dialInfoUpstream = &Upstream{
+					Dial: addr.JoinHostPort(0),
+				}
 			}
 			dialInfo, _ := dialInfoUpstream.fillDialInfo(repl)

@@ -500,7 +506,7 @@ func (h *Handler) doActiveHealthCheck(dialInfo DialInfo, hostAddr string, networ
 	}

 	// do the request, being careful to tame the response body
-	resp, err := h.HealthChecks.Active.httpClient.Do(req)
+	resp, err := h.HealthChecks.Active.httpClient.Do(req) //nolint:gosec // no SSRF
 	if err != nil {
 		if c := h.HealthChecks.Active.logger.Check(zapcore.InfoLevel, "HTTP request failed"); c != nil {
 			c.Write(
@@ -19,7 +19,9 @@ import (
 	"fmt"
 	"net/netip"
 	"strconv"
+	"sync"
 	"sync/atomic"
+	"time"

 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
@@ -132,6 +134,43 @@ func (u *Upstream) fillHost() {
 	u.Host = host
 }

+// fillDynamicHost is like fillHost, but stores the host in the separate
+// dynamicHosts map rather than the reference-counted UsagePool. Dynamic
+// hosts are not reference-counted; instead, they are retained as long as
+// they are actively seen and are evicted by a background cleanup goroutine
+// after dynamicHostIdleExpiry of inactivity. This preserves health state
+// (e.g. passive fail counts) across sequential requests.
+func (u *Upstream) fillDynamicHost() {
+	dynamicHostsMu.Lock()
+	entry, ok := dynamicHosts[u.String()]
+	if ok {
+		entry.lastSeen = time.Now()
+		dynamicHosts[u.String()] = entry
+		u.Host = entry.host
+	} else {
+		h := new(Host)
+		dynamicHosts[u.String()] = dynamicHostEntry{host: h, lastSeen: time.Now()}
+		u.Host = h
+	}
+	dynamicHostsMu.Unlock()
+
+	// ensure the cleanup goroutine is running
+	dynamicHostsCleanerOnce.Do(func() {
+		go func() {
+			for {
+				time.Sleep(dynamicHostCleanupInterval)
+				dynamicHostsMu.Lock()
+				for addr, entry := range dynamicHosts {
+					if time.Since(entry.lastSeen) > dynamicHostIdleExpiry {
+						delete(dynamicHosts, addr)
+					}
+				}
+				dynamicHostsMu.Unlock()
+			}
+		}()
+	})
+}
+
 // Host is the basic, in-memory representation of the state of a remote host.
 // Its fields are accessed atomically and Host values must not be copied.
 type Host struct {
@@ -268,6 +307,28 @@ func GetDialInfo(ctx context.Context) (DialInfo, bool) {
 // through config reloads.
 var hosts = caddy.NewUsagePool()

+// dynamicHosts tracks hosts that were provisioned from dynamic upstream
+// sources. Unlike static upstreams which are reference-counted via the
+// UsagePool, dynamic upstream hosts are not reference-counted. Instead,
+// their last-seen time is updated on each request, and a background
+// goroutine evicts entries that have been idle for dynamicHostIdleExpiry.
+// This preserves health state (e.g. passive fail counts) across requests
+// to the same dynamic backend.
+var (
+	dynamicHosts               = make(map[string]dynamicHostEntry)
+	dynamicHostsMu             sync.RWMutex
+	dynamicHostsCleanerOnce    sync.Once
+	dynamicHostCleanupInterval = 5 * time.Minute
+	dynamicHostIdleExpiry      = time.Hour
+)
+
+// dynamicHostEntry holds a Host and the last time it was seen
+// in a set of dynamic upstreams returned for a request.
+type dynamicHostEntry struct {
+	host     *Host
+	lastSeen time.Time
+}
+
 // dialInfoVarKey is the key used for the variable that holds
 // the dial info for the upstream connection.
 const dialInfoVarKey = "reverse_proxy.dial_info"
@@ -21,7 +21,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"net"
 	"net/http"
 	"net/url"
@@ -40,6 +40,7 @@ import (
 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp/headers"
 	"github.com/caddyserver/caddy/v2/modules/caddytls"
 	"github.com/caddyserver/caddy/v2/modules/internal/network"
 )
@@ -265,7 +266,7 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 			PreferGo: true,
 			Dial: func(ctx context.Context, _, _ string) (net.Conn, error) {
 				//nolint:gosec
-				addr := h.Resolver.netAddrs[weakrand.Intn(len(h.Resolver.netAddrs))]
+				addr := h.Resolver.netAddrs[weakrand.IntN(len(h.Resolver.netAddrs))]
 				return d.DialContext(ctx, addr.Network, addr.JoinHostPort(0))
 			},
 		}
@@ -383,6 +384,9 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 	}
 	// we need to keep track if a proxy is used for a request
 	proxyWrapper := func(req *http.Request) (*url.URL, error) {
+		if proxy == nil {
+			return nil, nil
+		}
 		u, err := proxy(req)
 		if u == nil || err != nil {
 			return u, err
@@ -411,8 +415,13 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 			return nil, fmt.Errorf("making TLS client config: %v", err)
 		}

-		// servername has a placeholder, so we need to replace it
-		if strings.Contains(h.TLS.ServerName, "{") {
+		serverNameHasPlaceholder := strings.Contains(h.TLS.ServerName, "{")
+
+		// We need to use custom DialTLSContext if:
+		// 1. ServerName has a placeholder that needs to be replaced at request-time, OR
+		// 2. ProxyProtocol is enabled, because req.URL.Host is modified to include
+		//    client address info with "->" separator which breaks Go's address parsing
+		if serverNameHasPlaceholder || h.ProxyProtocol != "" {
 			rt.DialTLSContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
 				// reuses the dialer from above to establish a plaintext connection
 				conn, err := dialContext(ctx, network, addr)
@@ -421,9 +430,11 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 				}

 				// but add our own handshake logic
-				repl := ctx.Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
 				tlsConfig := rt.TLSClientConfig.Clone()
-				tlsConfig.ServerName = repl.ReplaceAll(tlsConfig.ServerName, "")
+				if serverNameHasPlaceholder {
+					repl := ctx.Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
+					tlsConfig.ServerName = repl.ReplaceAll(tlsConfig.ServerName, "")
+				}

 				// h1 only
 				if caddyhttp.GetVar(ctx, tlsH1OnlyVarKey) == true {
@@ -437,7 +448,7 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 				// complete the handshake before returning the connection
 				if rt.TLSHandshakeTimeout != 0 {
 					var cancel context.CancelFunc
-					ctx, cancel = context.WithTimeout(ctx, rt.TLSHandshakeTimeout)
+					ctx, cancel = context.WithTimeoutCause(ctx, rt.TLSHandshakeTimeout, fmt.Errorf("HTTP transport TLS handshake %ds timeout", int(rt.TLSHandshakeTimeout.Seconds())))
 					defer cancel()
 				}
 				err = tlsConn.HandshakeContext(ctx)
@@ -514,6 +525,28 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 	return rt, nil
 }

+// RequestHeaderOps implements TransportHeaderOpsProvider. It returns header
+// operations for requests when the transport's configuration indicates they
+// should be applied. In particular, when TLS is enabled for this transport,
+// return an operation to set the Host header to the upstream host:port
+// placeholder so HTTPS upstreams get the proper Host by default.
+//
+// Note: this is a provision-time hook; the Handler will call this during
+// its Provision and cache the resulting HeaderOps. The HeaderOps are
+// applied per-request (so placeholders are expanded at request time).
+func (h *HTTPTransport) RequestHeaderOps() *headers.HeaderOps {
+	// If TLS is not configured for this transport, don't inject Host
+	// defaults. TLS being non-nil indicates HTTPS to the upstream.
+	if h.TLS == nil {
+		return nil
+	}
+	return &headers.HeaderOps{
+		Set: http.Header{
+			"Host": []string{"{http.reverse_proxy.upstream.hostport}"},
+		},
+	}
+}
+
 // RoundTrip implements http.RoundTripper.
 func (h *HTTPTransport) RoundTrip(req *http.Request) (*http.Response, error) {
 	h.SetScheme(req)
@@ -1,11 +1,13 @@
 package reverseproxy

 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"reflect"
 	"testing"

+	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
 )

@@ -94,3 +96,102 @@ func TestHTTPTransportUnmarshalCaddyFileWithCaPools(t *testing.T) {
 		})
 	}
 }
+
+func TestHTTPTransport_RequestHeaderOps_TLS(t *testing.T) {
+	var ht HTTPTransport
+	// When TLS is nil, expect no header ops
+	if ops := ht.RequestHeaderOps(); ops != nil {
+		t.Fatalf("expected nil HeaderOps when TLS is nil, got: %#v", ops)
+	}
+
+	// When TLS is configured, expect a HeaderOps that sets Host
+	ht.TLS = &TLSConfig{}
+	ops := ht.RequestHeaderOps()
+	if ops == nil {
+		t.Fatal("expected non-nil HeaderOps when TLS is set")
+	}
+	if ops.Set == nil {
+		t.Fatalf("expected ops.Set to be non-nil, got nil")
+	}
+	if got := ops.Set.Get("Host"); got != "{http.reverse_proxy.upstream.hostport}" {
+		t.Fatalf("unexpected Host value; want placeholder, got: %s", got)
+	}
+}
+
+// TestHTTPTransport_DialTLSContext_ProxyProtocol verifies that when TLS and
+// ProxyProtocol are both enabled, DialTLSContext is set. This is critical because
+// ProxyProtocol modifies req.URL.Host to include client info with "->" separator
+// (e.g., "[2001:db8::1]:12345->127.0.0.1:443"), which breaks Go's address parsing.
+// Without a custom DialTLSContext, Go's HTTP library would fail with
+// "too many colons in address" when trying to parse the mangled host.
+func TestHTTPTransport_DialTLSContext_ProxyProtocol(t *testing.T) {
+	ctx, cancel := caddy.NewContext(caddy.Context{Context: context.Background()})
+	defer cancel()
+
+	tests := []struct {
+		name                    string
+		tls                     *TLSConfig
+		proxyProtocol           string
+		serverNameHasPlaceholder bool
+		expectDialTLSContext    bool
+	}{
+		{
+			name:                 "no TLS, no proxy protocol",
+			tls:                  nil,
+			proxyProtocol:        "",
+			expectDialTLSContext: false,
+		},
+		{
+			name:                 "TLS without proxy protocol",
+			tls:                  &TLSConfig{},
+			proxyProtocol:        "",
+			expectDialTLSContext: false,
+		},
+		{
+			name:                 "TLS with proxy protocol v1",
+			tls:                  &TLSConfig{},
+			proxyProtocol:        "v1",
+			expectDialTLSContext: true,
+		},
+		{
+			name:                 "TLS with proxy protocol v2",
+			tls:                  &TLSConfig{},
+			proxyProtocol:        "v2",
+			expectDialTLSContext: true,
+		},
+		{
+			name:                     "TLS with placeholder ServerName",
+			tls:                      &TLSConfig{ServerName: "{http.request.host}"},
+			proxyProtocol:            "",
+			serverNameHasPlaceholder: true,
+			expectDialTLSContext:     true,
+		},
+		{
+			name:                     "TLS with placeholder ServerName and proxy protocol",
+			tls:                      &TLSConfig{ServerName: "{http.request.host}"},
+			proxyProtocol:            "v2",
+			serverNameHasPlaceholder: true,
+			expectDialTLSContext:     true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ht := &HTTPTransport{
+				TLS:           tt.tls,
+				ProxyProtocol: tt.proxyProtocol,
+			}
+
+			rt, err := ht.NewTransport(ctx)
+			if err != nil {
+				t.Fatalf("NewTransport() error = %v", err)
+			}
+
+			hasDialTLSContext := rt.DialTLSContext != nil
+			if hasDialTLSContext != tt.expectDialTLSContext {
+				t.Errorf("DialTLSContext set = %v, want %v", hasDialTLSContext, tt.expectDialTLSContext)
+			}
+		})
+	}
+}
+
@@ -0,0 +1,391 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package reverseproxy
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/caddyserver/caddy/v2"
+)
+
+// newPassiveHandler builds a minimal Handler with passive health checks
+// configured and a live caddy.Context so the fail-forgetter goroutine can
+// be cancelled cleanly. The caller must call cancel() when done.
+func newPassiveHandler(t *testing.T, maxFails int, failDuration time.Duration) (*Handler, context.CancelFunc) {
+	t.Helper()
+	caddyCtx, cancel := caddy.NewContext(caddy.Context{Context: context.Background()})
+	h := &Handler{
+		ctx: caddyCtx,
+		HealthChecks: &HealthChecks{
+			Passive: &PassiveHealthChecks{
+				MaxFails:     maxFails,
+				FailDuration: caddy.Duration(failDuration),
+			},
+		},
+	}
+	return h, cancel
+}
+
+// provisionedStaticUpstream creates a static upstream, registers it in the
+// UsagePool, and returns a cleanup func that removes it from the pool.
+func provisionedStaticUpstream(t *testing.T, h *Handler, addr string) (*Upstream, func()) {
+	t.Helper()
+	u := &Upstream{Dial: addr}
+	h.provisionUpstream(u, false)
+	return u, func() { _, _ = hosts.Delete(addr) }
+}
+
+// provisionedDynamicUpstream creates a dynamic upstream, registers it in
+// dynamicHosts, and returns a cleanup func that removes it.
+func provisionedDynamicUpstream(t *testing.T, h *Handler, addr string) (*Upstream, func()) {
+	t.Helper()
+	u := &Upstream{Dial: addr}
+	h.provisionUpstream(u, true)
+	return u, func() {
+		dynamicHostsMu.Lock()
+		delete(dynamicHosts, addr)
+		dynamicHostsMu.Unlock()
+	}
+}
+
+// --- countFailure behaviour ---
+
+// TestCountFailureNoopWhenNoHealthChecks verifies that countFailure is a no-op
+// when HealthChecks is nil.
+func TestCountFailureNoopWhenNoHealthChecks(t *testing.T) {
+	resetDynamicHosts()
+	h := &Handler{}
+	u := &Upstream{Dial: "10.1.0.1:80", Host: new(Host)}
+
+	h.countFailure(u)
+
+	if u.Host.Fails() != 0 {
+		t.Errorf("expected 0 fails with no HealthChecks config, got %d", u.Host.Fails())
+	}
+}
+
+// TestCountFailureNoopWhenZeroDuration verifies that countFailure is a no-op
+// when FailDuration is 0 (the zero value disables passive checks).
+func TestCountFailureNoopWhenZeroDuration(t *testing.T) {
+	resetDynamicHosts()
+	caddyCtx, cancel := caddy.NewContext(caddy.Context{Context: context.Background()})
+	defer cancel()
+	h := &Handler{
+		ctx: caddyCtx,
+		HealthChecks: &HealthChecks{
+			Passive: &PassiveHealthChecks{MaxFails: 1, FailDuration: 0},
+		},
+	}
+	u := &Upstream{Dial: "10.1.0.2:80", Host: new(Host)}
+
+	h.countFailure(u)
+
+	if u.Host.Fails() != 0 {
+		t.Errorf("expected 0 fails with zero FailDuration, got %d", u.Host.Fails())
+	}
+}
+
+// TestCountFailureIncrementsCount verifies that countFailure increments the
+// fail count on the upstream's Host.
+func TestCountFailureIncrementsCount(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+	u := &Upstream{Dial: "10.1.0.3:80", Host: new(Host)}
+
+	h.countFailure(u)
+
+	if u.Host.Fails() != 1 {
+		t.Errorf("expected 1 fail after countFailure, got %d", u.Host.Fails())
+	}
+}
+
+// TestCountFailureDecrementsAfterDuration verifies that the fail count is
+// decremented back after FailDuration elapses.
+func TestCountFailureDecrementsAfterDuration(t *testing.T) {
+	resetDynamicHosts()
+	const failDuration = 50 * time.Millisecond
+	h, cancel := newPassiveHandler(t, 2, failDuration)
+	defer cancel()
+	u := &Upstream{Dial: "10.1.0.4:80", Host: new(Host)}
+
+	h.countFailure(u)
+	if u.Host.Fails() != 1 {
+		t.Fatalf("expected 1 fail immediately after countFailure, got %d", u.Host.Fails())
+	}
+
+	// Wait long enough for the forgetter goroutine to fire.
+	time.Sleep(3 * failDuration)
+
+	if u.Host.Fails() != 0 {
+		t.Errorf("expected fail count to return to 0 after FailDuration, got %d", u.Host.Fails())
+	}
+}
+
+// TestCountFailureCancelledContextForgets verifies that cancelling the handler
+// context (simulating a config unload) also triggers the forgetter to run,
+// decrementing the fail count.
+func TestCountFailureCancelledContextForgets(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Hour) // very long duration
+	u := &Upstream{Dial: "10.1.0.5:80", Host: new(Host)}
+
+	h.countFailure(u)
+	if u.Host.Fails() != 1 {
+		t.Fatalf("expected 1 fail immediately after countFailure, got %d", u.Host.Fails())
+	}
+
+	// Cancelling the context should cause the forgetter goroutine to exit and
+	// decrement the count.
+	cancel()
+	time.Sleep(50 * time.Millisecond)
+
+	if u.Host.Fails() != 0 {
+		t.Errorf("expected fail count to be decremented after context cancel, got %d", u.Host.Fails())
+	}
+}
+
+// --- static upstream passive health check ---
+
+// TestStaticUpstreamHealthyWithNoFailures verifies that a static upstream with
+// no recorded failures is considered healthy.
+func TestStaticUpstreamHealthyWithNoFailures(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	u, cleanup := provisionedStaticUpstream(t, h, "10.2.0.1:80")
+	defer cleanup()
+
+	if !u.Healthy() {
+		t.Error("upstream with no failures should be healthy")
+	}
+}
+
+// TestStaticUpstreamUnhealthyAtMaxFails verifies that a static upstream is
+// marked unhealthy once its fail count reaches MaxFails.
+func TestStaticUpstreamUnhealthyAtMaxFails(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	u, cleanup := provisionedStaticUpstream(t, h, "10.2.0.2:80")
+	defer cleanup()
+
+	h.countFailure(u)
+	if !u.Healthy() {
+		t.Error("upstream should still be healthy after 1 of 2 allowed failures")
+	}
+
+	h.countFailure(u)
+	if u.Healthy() {
+		t.Error("upstream should be unhealthy after reaching MaxFails=2")
+	}
+}
+
+// TestStaticUpstreamRecoversAfterFailDuration verifies that a static upstream
+// returns to healthy once its failures expire.
+func TestStaticUpstreamRecoversAfterFailDuration(t *testing.T) {
+	resetDynamicHosts()
+	const failDuration = 50 * time.Millisecond
+	h, cancel := newPassiveHandler(t, 1, failDuration)
+	defer cancel()
+
+	u, cleanup := provisionedStaticUpstream(t, h, "10.2.0.3:80")
+	defer cleanup()
+
+	h.countFailure(u)
+	if u.Healthy() {
+		t.Fatal("upstream should be unhealthy immediately after MaxFails failure")
+	}
+
+	time.Sleep(3 * failDuration)
+
+	if !u.Healthy() {
+		t.Errorf("upstream should recover to healthy after FailDuration, Fails=%d", u.Host.Fails())
+	}
+}
+
+// TestStaticUpstreamHealthPersistedAcrossReprovisioning verifies that static
+// upstreams share a Host via the UsagePool, so a second call to provisionUpstream
+// for the same address (as happens on config reload) sees the accumulated state.
+func TestStaticUpstreamHealthPersistedAcrossReprovisioning(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	u1, cleanup1 := provisionedStaticUpstream(t, h, "10.2.0.4:80")
+	defer cleanup1()
+
+	h.countFailure(u1)
+	h.countFailure(u1)
+
+	// Simulate a second handler instance referencing the same upstream
+	// (e.g. after a config reload that keeps the same backend address).
+	u2, cleanup2 := provisionedStaticUpstream(t, h, "10.2.0.4:80")
+	defer cleanup2()
+
+	if u1.Host != u2.Host {
+		t.Fatal("expected both Upstream structs to share the same *Host via UsagePool")
+	}
+	if u2.Healthy() {
+		t.Error("re-provisioned upstream should still see the prior fail count and be unhealthy")
+	}
+}
+
+// --- dynamic upstream passive health check ---
+
+// TestDynamicUpstreamHealthyWithNoFailures verifies that a freshly provisioned
+// dynamic upstream is healthy.
+func TestDynamicUpstreamHealthyWithNoFailures(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	u, cleanup := provisionedDynamicUpstream(t, h, "10.3.0.1:80")
+	defer cleanup()
+
+	if !u.Healthy() {
+		t.Error("dynamic upstream with no failures should be healthy")
+	}
+}
+
+// TestDynamicUpstreamUnhealthyAtMaxFails verifies that a dynamic upstream is
+// marked unhealthy once its fail count reaches MaxFails.
+func TestDynamicUpstreamUnhealthyAtMaxFails(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	u, cleanup := provisionedDynamicUpstream(t, h, "10.3.0.2:80")
+	defer cleanup()
+
+	h.countFailure(u)
+	if !u.Healthy() {
+		t.Error("dynamic upstream should still be healthy after 1 of 2 allowed failures")
+	}
+
+	h.countFailure(u)
+	if u.Healthy() {
+		t.Error("dynamic upstream should be unhealthy after reaching MaxFails=2")
+	}
+}
+
+// TestDynamicUpstreamFailCountPersistedBetweenRequests is the core regression
+// test: it simulates two sequential (non-concurrent) requests to the same
+// dynamic upstream. Before the fix, the UsagePool entry would be deleted
+// between requests, wiping the fail count. Now it should survive.
+func TestDynamicUpstreamFailCountPersistedBetweenRequests(t *testing.T) {
+	resetDynamicHosts()
+	h, cancel := newPassiveHandler(t, 2, time.Minute)
+	defer cancel()
+
+	// --- first request ---
+	u1 := &Upstream{Dial: "10.3.0.3:80"}
+	h.provisionUpstream(u1, true)
+	h.countFailure(u1)
+
+	if u1.Host.Fails() != 1 {
+		t.Fatalf("expected 1 fail after first request, got %d", u1.Host.Fails())
+	}
+
+	// Simulate end of first request: no delete from any pool (key difference
+	// vs. the old behaviour where hosts.Delete was deferred).
+
+	// --- second request: brand-new *Upstream struct, same dial address ---
+	u2 := &Upstream{Dial: "10.3.0.3:80"}
+	h.provisionUpstream(u2, true)
+
+	if u1.Host != u2.Host {
+		t.Fatal("expected both requests to share the same *Host pointer from dynamicHosts")
+	}
+	if u2.Host.Fails() != 1 {
+		t.Errorf("expected fail count to persist across requests, got %d", u2.Host.Fails())
+	}
+
+	// A second failure now tips it over MaxFails=2.
+	h.countFailure(u2)
+	if u2.Healthy() {
+		t.Error("upstream should be unhealthy after accumulated failures across requests")
+	}
+
+	// Cleanup.
+	dynamicHostsMu.Lock()
+	delete(dynamicHosts, "10.3.0.3:80")
+	dynamicHostsMu.Unlock()
+}
+
+// TestDynamicUpstreamRecoveryAfterFailDuration verifies that a dynamic
+// upstream's fail count expires and it returns to healthy.
+func TestDynamicUpstreamRecoveryAfterFailDuration(t *testing.T) {
+	resetDynamicHosts()
+	const failDuration = 50 * time.Millisecond
+	h, cancel := newPassiveHandler(t, 1, failDuration)
+	defer cancel()
+
+	u, cleanup := provisionedDynamicUpstream(t, h, "10.3.0.4:80")
+	defer cleanup()
+
+	h.countFailure(u)
+	if u.Healthy() {
+		t.Fatal("upstream should be unhealthy immediately after MaxFails failure")
+	}
+
+	time.Sleep(3 * failDuration)
+
+	// Re-provision (as a new request would) to get fresh *Upstream with policy set.
+	u2 := &Upstream{Dial: "10.3.0.4:80"}
+	h.provisionUpstream(u2, true)
+
+	if !u2.Healthy() {
+		t.Errorf("dynamic upstream should recover to healthy after FailDuration, Fails=%d", u2.Host.Fails())
+	}
+}
+
+// TestDynamicUpstreamMaxRequestsFromUnhealthyRequestCount verifies that
+// UnhealthyRequestCount is copied into MaxRequests so Full() works correctly.
+func TestDynamicUpstreamMaxRequestsFromUnhealthyRequestCount(t *testing.T) {
+	resetDynamicHosts()
+	caddyCtx, cancel := caddy.NewContext(caddy.Context{Context: context.Background()})
+	defer cancel()
+	h := &Handler{
+		ctx: caddyCtx,
+		HealthChecks: &HealthChecks{
+			Passive: &PassiveHealthChecks{
+				UnhealthyRequestCount: 3,
+			},
+		},
+	}
+
+	u, cleanup := provisionedDynamicUpstream(t, h, "10.3.0.5:80")
+	defer cleanup()
+
+	if u.MaxRequests != 3 {
+		t.Errorf("expected MaxRequests=3 from UnhealthyRequestCount, got %d", u.MaxRequests)
+	}
+
+	// Should not be full with fewer requests than the limit.
+	_ = u.Host.countRequest(2)
+	if u.Full() {
+		t.Error("upstream should not be full with 2 of 3 allowed requests")
+	}
+
+	_ = u.Host.countRequest(1)
+	if !u.Full() {
+		t.Error("upstream should be full at UnhealthyRequestCount concurrent requests")
+	}
+}
@@ -0,0 +1,257 @@
+package reverseproxy
+
+import (
+	"errors"
+	"io"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/caddyserver/caddy/v2"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
+)
+
+// prepareTestRequest injects the context values that ServeHTTP and
+// proxyLoopIteration require (caddy.ReplacerCtxKey, VarsCtxKey, etc.) using
+// the same helper that the real HTTP server uses.
+//
+// A zero-value Server is passed so that caddyhttp.ServerCtxKey is set to a
+// non-nil pointer; reverseProxy dereferences it to check ShouldLogCredentials.
+func prepareTestRequest(req *http.Request) *http.Request {
+	repl := caddy.NewReplacer()
+	return caddyhttp.PrepareRequest(req, repl, nil, &caddyhttp.Server{})
+}
+
+// closeOnCloseReader is an io.ReadCloser whose Close method actually makes
+// subsequent reads fail, mimicking the behaviour of a real HTTP request body
+// (as opposed to io.NopCloser, whose Close is a no-op and would mask the bug
+// we are testing).
+type closeOnCloseReader struct {
+	mu     sync.Mutex
+	r      *strings.Reader
+	closed bool
+}
+
+func newCloseOnCloseReader(s string) *closeOnCloseReader {
+	return &closeOnCloseReader{r: strings.NewReader(s)}
+}
+
+func (c *closeOnCloseReader) Read(p []byte) (int, error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.closed {
+		return 0, errors.New("http: invalid Read on closed Body")
+	}
+	return c.r.Read(p)
+}
+
+func (c *closeOnCloseReader) Close() error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.closed = true
+	return nil
+}
+
+// deadUpstreamAddr returns a TCP address that is guaranteed to refuse
+// connections: we bind a listener, note its address, close it immediately,
+// and return the address. Any dial to that address will get ECONNREFUSED.
+func deadUpstreamAddr(t *testing.T) string {
+	t.Helper()
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("failed to create dead upstream listener: %v", err)
+	}
+	addr := ln.Addr().String()
+	ln.Close()
+	return addr
+}
+
+// testTransport wraps http.Transport to:
+//  1. Set the URL scheme to "http" when it is empty (matching what
+//     HTTPTransport.SetScheme does in production; cloneRequest strips the
+//     scheme intentionally so a plain *http.Transport would fail with
+//     "unsupported protocol scheme").
+//  2. Wrap dial errors as DialError so that tryAgain correctly identifies them
+//     as safe-to-retry regardless of request method (as HTTPTransport does in
+//     production via its custom dialer).
+type testTransport struct{ *http.Transport }
+
+func (t testTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	if req.URL.Scheme == "" {
+		req.URL.Scheme = "http"
+	}
+	resp, err := t.Transport.RoundTrip(req)
+	if err != nil {
+		// Wrap dial errors as DialError to match production behaviour.
+		// Without this wrapping, tryAgain treats ECONNREFUSED on a POST
+		// request as non-retryable (only GET is retried by default when
+		// the error is not a DialError).
+		var opErr *net.OpError
+		if errors.As(err, &opErr) && opErr.Op == "dial" {
+			return nil, DialError{err}
+		}
+	}
+	return resp, err
+}
+
+// minimalHandler returns a Handler with only the fields required by ServeHTTP
+// set directly, bypassing Provision (which requires a full Caddy runtime).
+// RoundRobinSelection is used so that successive iterations of the proxy loop
+// advance through the upstream pool in a predictable order.
+func minimalHandler(retries int, upstreams ...*Upstream) *Handler {
+	return &Handler{
+		logger:    zap.NewNop(),
+		Transport: testTransport{&http.Transport{}},
+		Upstreams: upstreams,
+		LoadBalancing: &LoadBalancing{
+			Retries:         retries,
+			SelectionPolicy: &RoundRobinSelection{},
+			// RetryMatch intentionally nil: dial errors are always retried
+			// regardless of RetryMatch or request method.
+		},
+		// ctx, connections, connectionsMu, events: zero/nil values are safe
+		// for the code paths exercised by these tests (TryInterval=0 so
+		// ctx.Done() is never consulted; no WebSocket hijacking; no passive
+		// health-check event emission).
+	}
+}
+
+// TestDialErrorBodyRetry verifies that a POST request whose body has NOT been
+// pre-buffered via request_buffers can still be retried after a dial error.
+//
+// Before the fix, a dial error caused Go's transport to close the shared body
+// (via cloneRequest's shallow copy), so the retry attempt would read from an
+// already-closed io.ReadCloser and produce:
+//
+//	http: invalid Read on closed Body → HTTP 502
+//
+// After the fix the handler wraps the body in noCloseBody when retries are
+// configured, preventing the transport's Close() from propagating to the
+// shared body. Since dial errors never read any bytes, the body remains at
+// position 0 for the retry.
+func TestDialErrorBodyRetry(t *testing.T) {
+	// Good upstream: echoes the request body with 200 OK.
+	goodServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		body, err := io.ReadAll(r.Body)
+		if err != nil {
+			http.Error(w, "read body: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write(body)
+	}))
+	t.Cleanup(goodServer.Close)
+
+	const requestBody = "hello, retry"
+
+	tests := []struct {
+		name       string
+		method     string
+		body       string
+		retries    int
+		wantStatus int
+		wantBody   string
+	}{
+		{
+			// Core regression case: POST with a body, no request_buffers,
+			// dial error on first upstream → retry to second upstream succeeds.
+			name:       "POST body retried after dial error",
+			method:     http.MethodPost,
+			body:       requestBody,
+			retries:    1,
+			wantStatus: http.StatusOK,
+			wantBody:   requestBody,
+		},
+		{
+			// Dial errors are always retried regardless of method, but there
+			// is no body to re-read, so GET has always worked. Keep it as a
+			// sanity check that we did not break the no-body path.
+			name:       "GET without body retried after dial error",
+			method:     http.MethodGet,
+			body:       "",
+			retries:    1,
+			wantStatus: http.StatusOK,
+			wantBody:   "",
+		},
+		{
+			// Without any retry configuration the handler must give up on the
+			// first dial error and return a 502. Confirms no wrapping occurs
+			// in the no-retry path.
+			name:       "no retries configured returns 502 on dial error",
+			method:     http.MethodPost,
+			body:       requestBody,
+			retries:    0,
+			wantStatus: http.StatusBadGateway,
+			wantBody:   "",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			dead := deadUpstreamAddr(t)
+
+			// Build the upstream pool. RoundRobinSelection starts its
+			// counter at 0 and increments before returning, so with a
+			// two-element pool it picks index 1 first, then index 0.
+			// Put the good upstream at index 0 and the dead one at
+			// index 1 so that:
+			//   attempt 1 → pool[1] = dead → DialError (ECONNREFUSED)
+			//   attempt 2 → pool[0] = good → 200
+			upstreams := []*Upstream{
+				{Host: new(Host), Dial: goodServer.Listener.Addr().String()},
+				{Host: new(Host), Dial: dead},
+			}
+			if tc.retries == 0 {
+				// For the "no retries" case use only the dead upstream so
+				// there is nowhere to retry to.
+				upstreams = []*Upstream{
+					{Host: new(Host), Dial: dead},
+				}
+			}
+
+			h := minimalHandler(tc.retries, upstreams...)
+
+			// Use closeOnCloseReader so that Close() truly prevents further
+			// reads, matching real http.body semantics. io.NopCloser would
+			// mask the bug because its Close is a no-op.
+			var bodyReader io.ReadCloser
+			if tc.body != "" {
+				bodyReader = newCloseOnCloseReader(tc.body)
+			}
+			req := httptest.NewRequest(tc.method, "http://example.com/", bodyReader)
+			if bodyReader != nil {
+				// httptest.NewRequest wraps the reader in NopCloser; replace
+				// it with our close-aware reader so Close() is propagated.
+				req.Body = bodyReader
+				req.ContentLength = int64(len(tc.body))
+			}
+			req = prepareTestRequest(req)
+
+			rec := httptest.NewRecorder()
+			err := h.ServeHTTP(rec, req, caddyhttp.HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+				return nil
+			}))
+
+			// For error cases (e.g. 502) ServeHTTP returns a HandlerError
+			// rather than writing the status itself.
+			gotStatus := rec.Code
+			if err != nil {
+				if herr, ok := err.(caddyhttp.HandlerError); ok {
+					gotStatus = herr.StatusCode
+				}
+			}
+
+			if gotStatus != tc.wantStatus {
+				t.Errorf("status: got %d, want %d (err=%v)", gotStatus, tc.wantStatus, err)
+			}
+			if tc.wantBody != "" && rec.Body.String() != tc.wantBody {
+				t.Errorf("body: got %q, want %q", rec.Body.String(), tc.wantBody)
+			}
+		})
+	}
+}
@@ -32,6 +32,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"

 	"go.uber.org/zap"
@@ -46,6 +47,31 @@ import (
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite"
 )

+// inFlightRequests uses sync.Map with atomic.Int64 for lock-free updates on the hot path
+var inFlightRequests sync.Map
+
+func incInFlightRequest(address string) {
+	v, _ := inFlightRequests.LoadOrStore(address, new(atomic.Int64))
+	v.(*atomic.Int64).Add(1)
+}
+
+func decInFlightRequest(address string) {
+	if v, ok := inFlightRequests.Load(address); ok {
+		if v.(*atomic.Int64).Add(-1) <= 0 {
+			inFlightRequests.Delete(address)
+		}
+	}
+}
+
+func getInFlightRequests() map[string]int64 {
+	copyMap := make(map[string]int64)
+	inFlightRequests.Range(func(key, value any) bool {
+		copyMap[key.(string)] = value.(*atomic.Int64).Load()
+		return true
+	})
+	return copyMap
+}
+
 func init() {
 	caddy.RegisterModule(Handler{})
 }
@@ -192,6 +218,13 @@ type Handler struct {
 	CB               CircuitBreaker    `json:"-"`
 	DynamicUpstreams UpstreamSource    `json:"-"`

+	// transportHeaderOps is a set of header operations provided
+	// by the transport at provision time, if the transport
+	// implements TransportHeaderOpsProvider. These ops are
+	// applied before any user-configured header ops so the
+	// user can override transport defaults.
+	transportHeaderOps *headers.HeaderOps
+
 	// Holds the parsed CIDR ranges from TrustedProxies
 	trustedProxies []netip.Prefix

@@ -322,6 +355,18 @@ func (h *Handler) Provision(ctx caddy.Context) error {
 		h.Transport = t
 	}

+	// If the transport can provide header ops, cache them now so we don't
+	// have to compute them per-request. Provision the HeaderOps if present
+	// so any runtime artifacts (like precompiled regex) are prepared.
+	if tph, ok := h.Transport.(RequestHeaderOpsTransport); ok {
+		h.transportHeaderOps = tph.RequestHeaderOps()
+		if h.transportHeaderOps != nil {
+			if err := h.transportHeaderOps.Provision(ctx); err != nil {
+				return fmt.Errorf("provisioning transport header ops: %v", err)
+			}
+		}
+	}
+
 	// set up load balancing
 	if h.LoadBalancing == nil {
 		h.LoadBalancing = new(LoadBalancing)
@@ -347,7 +392,7 @@ func (h *Handler) Provision(ctx caddy.Context) error {

 	// set up upstreams
 	for _, u := range h.Upstreams {
-		h.provisionUpstream(u)
+		h.provisionUpstream(u, false)
 	}

 	if h.HealthChecks != nil {
@@ -437,18 +482,31 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht
 	reqHost := clonedReq.Host
 	reqHeader := clonedReq.Header

-	// If the cloned request body was fully buffered, keep a reference to its
-	// buffer so we can reuse it across retries and return it to the pool
-	// once we’re done.
+	// When retries are configured and there is a body, wrap it in
+	// io.NopCloser to prevent Go's transport from closing it on dial
+	// errors. cloneRequest does a shallow copy, so clonedReq.Body and
+	// r.Body share the same io.ReadCloser — a dial-failure Close()
+	// would kill the original body for all subsequent retry attempts.
+	// The real body is closed by the HTTP server when the handler
+	// returns.
+	//
+	// If the body was already fully buffered (via request_buffers),
+	// we also extract the buffer so the retry loop can replay it
+	// from the beginning on each attempt. (see #6259, #7546)
 	var bufferedReqBody *bytes.Buffer
-	if reqBodyBuf, ok := clonedReq.Body.(bodyReadCloser); ok && reqBodyBuf.body == nil && reqBodyBuf.buf != nil {
-		bufferedReqBody = reqBodyBuf.buf
-		reqBodyBuf.buf = nil
-
-		defer func() {
-			bufferedReqBody.Reset()
-			bufPool.Put(bufferedReqBody)
-		}()
+	if clonedReq.Body != nil && h.LoadBalancing != nil &&
+		(h.LoadBalancing.Retries > 0 || h.LoadBalancing.TryDuration > 0) {
+		if reqBodyBuf, ok := clonedReq.Body.(bodyReadCloser); ok && reqBodyBuf.body == nil && reqBodyBuf.buf != nil {
+			bufferedReqBody = reqBodyBuf.buf
+			reqBodyBuf.buf = nil
+			clonedReq.Body = io.NopCloser(bytes.NewReader(bufferedReqBody.Bytes()))
+			defer func() {
+				bufferedReqBody.Reset()
+				bufPool.Put(bufferedReqBody)
+			}()
+		} else {
+			clonedReq.Body = io.NopCloser(clonedReq.Body)
+		}
 	}

 	start := time.Now()
@@ -518,18 +576,11 @@ func (h *Handler) proxyLoopIteration(r *http.Request, origReq *http.Request, w h
 		} else {
 			upstreams = dUpstreams
 			for _, dUp := range dUpstreams {
-				h.provisionUpstream(dUp)
+				h.provisionUpstream(dUp, true)
 			}
 			if c := h.logger.Check(zapcore.DebugLevel, "provisioned dynamic upstreams"); c != nil {
 				c.Write(zap.Int("count", len(dUpstreams)))
 			}
-			defer func() {
-				// these upstreams are dynamic, so they are only used for this iteration
-				// of the proxy loop; be sure to let them go away when we're done with them
-				for _, upstream := range dUpstreams {
-					_, _ = hosts.Delete(upstream.String())
-				}
-			}()
 		}
 	}

@@ -575,14 +626,26 @@ func (h *Handler) proxyLoopIteration(r *http.Request, origReq *http.Request, w h
 	repl.Set("http.reverse_proxy.upstream.fails", upstream.Host.Fails())

 	// mutate request headers according to this upstream;
-	// because we're in a retry loop, we have to copy
-	// headers (and the r.Host value) from the original
-	// so that each retry is identical to the first
-	if h.Headers != nil && h.Headers.Request != nil {
+	// because we're in a retry loop, we have to copy headers
+	// (and the r.Host value) from the original so that each
+	// retry is identical to the first. If either transport or
+	// user ops exist, apply them in order (transport first,
+	// then user, so user's config wins).
+	var userOps *headers.HeaderOps
+	if h.Headers != nil {
+		userOps = h.Headers.Request
+	}
+	transportOps := h.transportHeaderOps
+	if transportOps != nil || userOps != nil {
 		r.Header = make(http.Header)
 		copyHeader(r.Header, reqHeader)
 		r.Host = reqHost
-		h.Headers.Request.ApplyToRequest(r)
+		if transportOps != nil {
+			transportOps.ApplyToRequest(r)
+		}
+		if userOps != nil {
+			userOps.ApplyToRequest(r)
+		}
 	}

 	// proxy the request to that upstream
@@ -770,37 +833,53 @@ func (h Handler) prepareRequest(req *http.Request, repl *caddy.Replacer) (*http.
 // the headers at all, then they will be added with the values
 // that we can glean from the request.
 func (h Handler) addForwardedHeaders(req *http.Request) error {
-	// Parse the remote IP, ignore the error as non-fatal,
-	// but the remote IP is required to continue, so we
-	// just return early. This should probably never happen
-	// though, unless some other module manipulated the request's
-	// remote address and used an invalid value.
-	clientIP, _, err := net.SplitHostPort(req.RemoteAddr)
-	if err != nil {
-		// Remove the `X-Forwarded-*` headers to avoid upstreams
-		// potentially trusting a header that came from the client
-		req.Header.Del("X-Forwarded-For")
-		req.Header.Del("X-Forwarded-Proto")
-		req.Header.Del("X-Forwarded-Host")
-		return nil
-	}
-
-	// Client IP may contain a zone if IPv6, so we need
-	// to pull that out before parsing the IP
-	clientIP, _, _ = strings.Cut(clientIP, "%")
-	ipAddr, err := netip.ParseAddr(clientIP)
-
 	// Check if the client is a trusted proxy
 	trusted := caddyhttp.GetVar(req.Context(), caddyhttp.TrustedProxyVarKey).(bool)

-	// If ParseAddr fails (e.g. non-IP network like SCION), we cannot check
-	// if it is a trusted proxy by IP range. In this case, we ignore the
-	// error and treat the connection as untrusted (or retain existing status).
-	if err == nil {
-		for _, ipRange := range h.trustedProxies {
-			if ipRange.Contains(ipAddr) {
-				trusted = true
-				break
+	var clientIP string
+
+	if req.RemoteAddr == "@" {
+		// For Unix socket connections, RemoteAddr is "@" which cannot
+		// be parsed as host:port. If untrusted, strip forwarded headers
+		// for security. If trusted, there is no peer IP to append to
+		// X-Forwarded-For, so clientIP stays empty.
+		if !trusted {
+			req.Header.Del("X-Forwarded-For")
+			req.Header.Del("X-Forwarded-Proto")
+			req.Header.Del("X-Forwarded-Host")
+			return nil
+		}
+	} else {
+		// Parse the remote IP, ignore the error as non-fatal,
+		// but the remote IP is required to continue, so we
+		// just return early. This should probably never happen
+		// though, unless some other module manipulated the request's
+		// remote address and used an invalid value.
+		var err error
+		clientIP, _, err = net.SplitHostPort(req.RemoteAddr)
+		if err != nil {
+			// Remove the `X-Forwarded-*` headers to avoid upstreams
+			// potentially trusting a header that came from the client
+			req.Header.Del("X-Forwarded-For")
+			req.Header.Del("X-Forwarded-Proto")
+			req.Header.Del("X-Forwarded-Host")
+			return nil
+		}
+
+		// Client IP may contain a zone if IPv6, so we need
+		// to pull that out before parsing the IP
+		clientIP, _, _ = strings.Cut(clientIP, "%")
+		ipAddr, err := netip.ParseAddr(clientIP)
+
+		// If ParseAddr fails (e.g. non-IP network like SCION), we cannot check
+		// if it is a trusted proxy by IP range. In this case, we ignore the
+		// error and treat the connection as untrusted (or retain existing status).
+		if err == nil {
+			for _, ipRange := range h.trustedProxies {
+				if ipRange.Contains(ipAddr) {
+					trusted = true
+					break
+				}
 			}
 		}
 	}
@@ -808,13 +887,17 @@ func (h Handler) addForwardedHeaders(req *http.Request) error {
 	// If we aren't the first proxy, and the proxy is trusted,
 	// retain prior X-Forwarded-For information as a comma+space
 	// separated list and fold multiple headers into one.
-	clientXFF := clientIP
 	prior, ok, omit := allHeaderValues(req.Header, "X-Forwarded-For")
-	if trusted && ok && prior != "" {
-		clientXFF = prior + ", " + clientXFF
-	}
 	if !omit {
-		req.Header.Set("X-Forwarded-For", clientXFF)
+		if trusted && ok && prior != "" {
+			if clientIP != "" {
+				req.Header.Set("X-Forwarded-For", prior+", "+clientIP)
+			} else {
+				req.Header.Set("X-Forwarded-For", prior)
+			}
+		} else if clientIP != "" {
+			req.Header.Set("X-Forwarded-For", clientIP)
+		}
 	}

 	// Set X-Forwarded-Proto; many backend apps expect this,
@@ -853,8 +936,16 @@ func (h Handler) addForwardedHeaders(req *http.Request) error {
 // Go standard library which was used as the foundation.)
 func (h *Handler) reverseProxy(rw http.ResponseWriter, req *http.Request, origReq *http.Request, repl *caddy.Replacer, di DialInfo, next caddyhttp.Handler) error {
 	_ = di.Upstream.Host.countRequest(1)
+
+	// Increment the in-flight request count
+	incInFlightRequest(di.Address)
+
 	//nolint:errcheck
-	defer di.Upstream.Host.countRequest(-1)
+	defer func() {
+		di.Upstream.Host.countRequest(-1)
+		// Decrement the in-flight request count
+		decInFlightRequest(di.Address)
+	}()

 	// point the request to this upstream
 	h.directRequest(req, di)
@@ -1227,16 +1318,28 @@ func (h *Handler) directRequest(req *http.Request, di DialInfo) {
 	// add client address to the host to let transport differentiate requests from different clients
 	if ppt, ok := h.Transport.(ProxyProtocolTransport); ok && ppt.ProxyProtocolEnabled() {
 		if proxyProtocolInfo, ok := caddyhttp.GetVar(req.Context(), proxyProtocolInfoVarKey).(ProxyProtocolInfo); ok {
-			reqHost = proxyProtocolInfo.AddrPort.String() + "->" + reqHost
+			// encode the request so it plays well with h2 transport, it's unnecessary for h1 but anyway
+			// The issue is that h2 transport will use the address to determine if new connections are needed
+			// to roundtrip requests but the without escaping, new connections are constantly created and closed until
+			// file descriptors are exhausted.
+			// see: https://github.com/caddyserver/caddy/issues/7529
+			reqHost = url.QueryEscape(proxyProtocolInfo.AddrPort.String() + "->" + reqHost)
 		}
 	}

 	req.URL.Host = reqHost
 }

-func (h Handler) provisionUpstream(upstream *Upstream) {
-	// create or get the host representation for this upstream
-	upstream.fillHost()
+func (h Handler) provisionUpstream(upstream *Upstream, dynamic bool) {
+	// create or get the host representation for this upstream;
+	// dynamic upstreams are tracked in a separate map with last-seen
+	// timestamps so their health state persists across requests without
+	// being reference-counted (and thus discarded between requests).
+	if dynamic {
+		upstream.fillDynamicHost()
+	} else {
+		upstream.fillHost()
+	}

 	// give it the circuit breaker, if any
 	upstream.cb = h.CB
@@ -1542,6 +1645,17 @@ type BufferedTransport interface {
 	DefaultBufferSizes() (int64, int64)
 }

+// RequestHeaderOpsTransport may be implemented by a transport to provide
+// header operations to apply to requests immediately before the RoundTrip.
+// For example, overriding the default Host when TLS is enabled.
+type RequestHeaderOpsTransport interface {
+	// RequestHeaderOps allows a transport to provide header operations
+	// to apply to the request. The transport is asked at provision time
+	// to return a HeaderOps (or nil) that will be applied before
+	// user-configured header ops.
+	RequestHeaderOps() *headers.HeaderOps
+}
+
 // roundtripSucceededError is an error type that is returned if the
 // roundtrip succeeded, but an error occurred after-the-fact.
 type roundtripSucceededError struct{ error }
@@ -20,7 +20,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"net"
 	"net/http"
 	"strconv"
@@ -225,7 +225,7 @@ func (r RandomChoiceSelection) Select(pool UpstreamPool, _ *http.Request, _ http
 		if !upstream.Available() {
 			continue
 		}
-		j := weakrand.Intn(i + 1) //nolint:gosec
+		j := weakrand.IntN(i + 1) //nolint:gosec
 		if j < k {
 			choices[j] = upstream
 		}
@@ -274,7 +274,7 @@ func (LeastConnSelection) Select(pool UpstreamPool, _ *http.Request, _ http.Resp
 		// sample: https://en.wikipedia.org/wiki/Reservoir_sampling
 		if numReqs == leastReqs {
 			count++
-			if count == 1 || (weakrand.Int()%count) == 0 { //nolint:gosec
+			if count == 1 || weakrand.IntN(count) == 0 { //nolint:gosec
 				bestHost = host
 			}
 		}
@@ -312,7 +312,7 @@ func (r *RoundRobinSelection) Select(pool UpstreamPool, _ *http.Request, _ http.
 	if n == 0 {
 		return nil
 	}
-	for i := uint32(0); i < n; i++ {
+	for range n {
 		robin := atomic.AddUint32(&r.robin, 1)
 		host := pool[robin%n]
 		if host.Available() {
@@ -617,7 +617,7 @@ type CookieHashSelection struct {
 	// The HTTP cookie name whose value is to be hashed and used for upstream selection.
 	Name string `json:"name,omitempty"`
 	// Secret to hash (Hmac256) chosen upstream in cookie
-	Secret string `json:"secret,omitempty"`
+	Secret string `json:"secret,omitempty"` //nolint:gosec // yes it's exported because it needs to encode to JSON
 	// The cookie's Max-Age before it expires. Default is no expiry.
 	MaxAge caddy.Duration `json:"max_age,omitempty"`

@@ -788,7 +788,7 @@ func selectRandomHost(pool []*Upstream) *Upstream {
 		// upstream will always be chosen if there is at
 		// least one available
 		count++
-		if (weakrand.Int() % count) == 0 { //nolint:gosec
+		if weakrand.IntN(count) == 0 { //nolint:gosec
 			randomHost = upstream
 		}
 	}
@@ -827,7 +827,7 @@ func leastRequests(upstreams []*Upstream) *Upstream {
 	if len(best) == 1 {
 		return best[0]
 	}
-	return best[weakrand.Intn(len(best))] //nolint:gosec
+	return best[weakrand.IntN(len(best))] //nolint:gosec
 }

 // hostByHashing returns an available host from pool based on a hashable string s.
@@ -24,7 +24,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"mime"
 	"net/http"
 	"sync"
@@ -529,14 +529,14 @@ func maskBytes(key [4]byte, pos int, b []byte) int {
 	// Create aligned word size key.
 	var k [wordSize]byte
 	for i := range k {
-		k[i] = key[(pos+i)&3]
+		k[i] = key[(pos+i)&3] // nolint:gosec // false positive, impossible to be out of bounds; see: https://github.com/securego/gosec/issues/1525
 	}
 	kw := *(*uintptr)(unsafe.Pointer(&k))

 	// Mask one word at a time.
 	n := (len(b) / wordSize) * wordSize
 	for i := 0; i < n; i += wordSize {
-		*(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&b[0])) + uintptr(i))) ^= kw
+		*(*uintptr)(unsafe.Add(unsafe.Pointer(&b[0]), i)) ^= kw
 	}

 	// Mask one byte at a time for remaining bytes.
@@ -4,7 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	weakrand "math/rand"
+	weakrand "math/rand/v2"
 	"net"
 	"net/http"
 	"strconv"
@@ -107,7 +107,7 @@ func (su *SRVUpstreams) Provision(ctx caddy.Context) error {
 			PreferGo: true,
 			Dial: func(ctx context.Context, _, _ string) (net.Conn, error) {
 				//nolint:gosec
-				addr := su.Resolver.netAddrs[weakrand.Intn(len(su.Resolver.netAddrs))]
+				addr := su.Resolver.netAddrs[weakrand.IntN(len(su.Resolver.netAddrs))]
 				return d.DialContext(ctx, addr.Network, addr.JoinHostPort(0))
 			},
 		}
@@ -330,7 +330,7 @@ func (au *AUpstreams) Provision(ctx caddy.Context) error {
 			PreferGo: true,
 			Dial: func(ctx context.Context, _, _ string) (net.Conn, error) {
 				//nolint:gosec
-				addr := au.Resolver.netAddrs[weakrand.Intn(len(au.Resolver.netAddrs))]
+				addr := au.Resolver.netAddrs[weakrand.IntN(len(au.Resolver.netAddrs))]
 				return d.DialContext(ctx, addr.Network, addr.JoinHostPort(0))
 			},
 		}
@@ -247,6 +247,7 @@ func (rewr Rewrite) Rewrite(r *http.Request, repl *caddy.Replacer) bool {
 			} else {
 				r.URL.Path = path
 			}
+			r.URL.RawPath = "" // force recomputing when EscapedPath() is called
 		}
 		if qsStart >= 0 {
 			r.URL.RawQuery = newQuery
@@ -224,6 +224,11 @@ func TestRewrite(t *testing.T) {
 			input:  newRequest(t, "GET", "/foo#fragFirst?c=d"),
 			expect: newRequest(t, "GET", "/bar#fragFirst?c=d"),
 		},
+		{
+			rule:   Rewrite{URI: "/api/admin/panel"},
+			input:  newRequest(t, "GET", "/api/admin%2Fpanel"),
+			expect: newRequest(t, "GET", "/api/admin/panel"),
+		},

 		{
 			rule:   Rewrite{StripPathPrefix: "/prefix"},
@@ -18,6 +18,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"strings"

 	"github.com/caddyserver/caddy/v2"
 )
@@ -96,7 +97,10 @@ type Route struct {
 	MatcherSets MatcherSets         `json:"-"`
 	Handlers    []MiddlewareHandler `json:"-"`

-	middleware []Middleware
+	middleware  []Middleware
+	metrics     *Metrics
+	metricsCtx  caddy.Context
+	handlerName string
 }

 // Empty returns true if the route has all zero/default values.
@@ -110,14 +114,16 @@ func (r Route) Empty() bool {
 }

 func (r Route) String() string {
-	handlersRaw := "["
+	var handlersRaw strings.Builder
+	handlersRaw.WriteByte('[')
 	for _, hr := range r.HandlersRaw {
-		handlersRaw += " " + string(hr)
+		handlersRaw.WriteByte(' ')
+		handlersRaw.WriteString(string(hr))
 	}
-	handlersRaw += "]"
+	handlersRaw.WriteByte(']')

 	return fmt.Sprintf(`{Group:"%s" MatcherSetsRaw:%s HandlersRaw:%s Terminal:%t}`,
-		r.Group, r.MatcherSetsRaw, handlersRaw, r.Terminal)
+		r.Group, r.MatcherSetsRaw, handlersRaw.String(), r.Terminal)
 }

 // Provision sets up both the matchers and handlers in the route.
@@ -159,12 +165,20 @@ func (r *Route) ProvisionHandlers(ctx caddy.Context, metrics *Metrics) error {
 		r.Handlers = append(r.Handlers, handler.(MiddlewareHandler))
 	}

+	// Store metrics info for route-level instrumentation (applied once
+	// per route in wrapRoute, instead of per-handler which was redundant).
+	r.metrics = metrics
+	r.metricsCtx = ctx
+	if len(r.Handlers) > 0 {
+		r.handlerName = caddy.GetModuleName(r.Handlers[0])
+	}
+
 	// Make ProvisionHandlers idempotent by clearing the middleware field
 	r.middleware = []Middleware{}

 	// pre-compile the middleware handler chain
 	for _, midhandler := range r.Handlers {
-		r.middleware = append(r.middleware, wrapMiddleware(ctx, midhandler, metrics))
+		r.middleware = append(r.middleware, wrapMiddleware(ctx, midhandler))
 	}
 	return nil
 }
@@ -295,6 +309,16 @@ func wrapRoute(route Route) Middleware {
 				nextCopy = route.middleware[i](nextCopy)
 			}

+			// Apply metrics instrumentation once for the entire route,
+			// rather than wrapping each individual handler. This avoids
+			// redundant metrics collection that caused significant CPU
+			// overhead (see issue #4644).
+			if route.metrics != nil {
+				nextCopy = newMetricsInstrumentedRoute(
+					route.metricsCtx, route.handlerName, nextCopy, route.metrics,
+				)
+			}
+
 			return nextCopy.ServeHTTP(rw, req)
 		})
 	}
@@ -303,20 +327,14 @@ func wrapRoute(route Route) Middleware {
 // wrapMiddleware wraps mh such that it can be correctly
 // appended to a list of middleware in preparation for
 // compiling into a handler chain.
-func wrapMiddleware(ctx caddy.Context, mh MiddlewareHandler, metrics *Metrics) Middleware {
-	handlerToUse := mh
-	if metrics != nil {
-		// wrap the middleware with metrics instrumentation
-		handlerToUse = newMetricsInstrumentedHandler(ctx, caddy.GetModuleName(mh), mh, metrics)
-	}
-
+func wrapMiddleware(ctx caddy.Context, mh MiddlewareHandler) Middleware {
 	return func(next Handler) Handler {
 		return HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
 			// EXPERIMENTAL: Trace each module that gets invoked
 			if server, ok := r.Context().Value(ServerCtxKey).(*Server); ok && server != nil {
-				server.logTrace(handlerToUse)
+				server.logTrace(mh)
 			}
-			return handlerToUse.ServeHTTP(w, r, next)
+			return mh.ServeHTTP(w, r, next)
 		})
 	}
 }
@@ -440,13 +458,15 @@ func (ms *MatcherSets) FromInterface(matcherSets any) error {

 // TODO: Is this used?
 func (ms MatcherSets) String() string {
-	result := "["
+	var result strings.Builder
+	result.WriteByte('[')
 	for _, matcherSet := range ms {
 		for _, matcher := range matcherSet {
-			result += fmt.Sprintf(" %#v", matcher)
+			fmt.Fprintf(&result, " %#v", matcher)
 		}
 	}
-	return result + " ]"
+	result.WriteByte(']')
+	return result.String()
 }

 var routeGroupCtxKey = caddy.CtxKey("route_group")
@@ -253,6 +253,16 @@ type Server struct {
 	// A nil value or element indicates that Protocols will be used instead.
 	ListenProtocols [][]string `json:"listen_protocols,omitempty"`

+	// If set, overrides whether QUIC listeners allow 0-RTT (early data).
+	// If nil, the default behavior is used (currently allowed).
+	//
+	// One reason to disable 0-RTT is if a remote IP matcher is used,
+	// which introduces a dependency on the remote address being verified
+	// if routing happens before the TLS handshake completes. An HTTP 425
+	// response is written in that case, but some clients misbehave and
+	// don't perform a retry, so disabling 0-RTT can smooth it out.
+	Allow0RTT *bool `json:"allow_0rtt,omitempty"`
+
 	// If set, metrics observations will be enabled.
 	// This setting is EXPERIMENTAL and subject to change.
 	// DEPRECATED: Use the app-level `metrics` field.
@@ -476,7 +486,7 @@ func (s *Server) serveHTTP(w http.ResponseWriter, r *http.Request) error {
 	// code to any HTTP/1.1 request message that lacks a Host header field and to any
 	// request message that contains more than one Host header field line or a Host
 	// header field with an invalid field value."
-	if r.Host == "" {
+	if r.ProtoMajor == 1 && r.ProtoMinor == 1 && r.Host == "" {
 		return HandlerError{
 			Err:        errors.New("rfc9112 forbids empty Host"),
 			StatusCode: http.StatusBadRequest,
@@ -650,7 +660,7 @@ func (s *Server) serveHTTP3(addr caddy.NetworkAddress, tlsCfg *tls.Config) error
 		return fmt.Errorf("starting HTTP/3 QUIC listener: %v", err)
 	}
 	addr.Network = h3net
-	h3ln, err := addr.ListenQUIC(s.ctx, 0, net.ListenConfig{}, tlsCfg, s.packetConnWrappers)
+	h3ln, err := addr.ListenQUIC(s.ctx, 0, net.ListenConfig{}, tlsCfg, s.packetConnWrappers, s.Allow0RTT)
 	if err != nil {
 		return fmt.Errorf("starting HTTP/3 QUIC listener: %v", err)
 	}
@@ -246,7 +246,7 @@ func (s StaticResponse) ServeHTTP(w http.ResponseWriter, r *http.Request, next H

 	// write response body
 	if statusCode != http.StatusEarlyHints && body != "" {
-		fmt.Fprint(w, body)
+		fmt.Fprint(w, body) //nolint:gosec // no XSS unless you sabatoge your own config
 	}

 	// continue handling after Early Hints as they are not the final response
@@ -312,10 +312,12 @@ func (m MatchVarsRE) MatchWithError(r *http.Request) (bool, error) {
 	repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
 	for key, val := range m {
 		var varValue any
+		var fromPlaceholder bool
 		if strings.HasPrefix(key, "{") &&
 			strings.HasSuffix(key, "}") &&
 			strings.Count(key, "{") == 1 {
 			varValue, _ = repl.Get(strings.Trim(key, "{}"))
+			fromPlaceholder = true
 		} else {
 			varValue = vars[key]
 		}
@@ -334,7 +336,14 @@ func (m MatchVarsRE) MatchWithError(r *http.Request) (bool, error) {
 			varStr = fmt.Sprintf("%v", vv)
 		}

-		valExpanded := repl.ReplaceAll(varStr, "")
+		// Only expand placeholders in values from literal variable names
+		// (e.g. map outputs). Values resolved from placeholder keys are
+		// already final and must not be re-expanded, as that would allow
+		// user input like {env.SECRET} to be evaluated.
+		valExpanded := varStr
+		if !fromPlaceholder {
+			valExpanded = repl.ReplaceAll(varStr, "")
+		}
 		if match := val.Match(valExpanded, repl); match {
 			return match, nil
 		}
--- a/Show More
+++ b/Show More