From 9d04853b34c0fe10732b6707493666c4931617aa Mon Sep 17 00:00:00 2001
From: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>
Date: Fri, 30 May 2025 22:04:52 +0200
Subject: [PATCH] fix: oauth (#18725)

---
 server/src/repositories/oauth.repository.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/server/src/repositories/oauth.repository.ts b/server/src/repositories/oauth.repository.ts
index ea9f0b1901..357b52a77a 100644
--- a/server/src/repositories/oauth.repository.ts
+++ b/server/src/repositories/oauth.repository.ts
@@ -40,8 +40,8 @@ export class OAuthRepository {
       redirect_uri: redirectUrl,
       scope: config.scope,
       state,
-      code_challenge: codeChallenge,
-      code_challenge_method: 'S256',
+      code_challenge: client.serverMetadata().supportsPKCE() ? codeChallenge : '',
+      code_challenge_method: client.serverMetadata().supportsPKCE() ? 'S256' : '',
     }).toString();
     return { url, state, codeVerifier };
   }