From cce6bf27e034b5cd7917242ad6eaa05a6414d7d9 Mon Sep 17 00:00:00 2001
From: JPVenson <github@jpb.email>
Date: Thu, 2 Oct 2025 02:26:56 +0300
Subject: [PATCH] Add check for processing recursive data structures (#14897)

---
 MediaBrowser.Controller/Entities/Folder.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index 1abb394b5b..9950e78525 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -337,6 +337,11 @@ namespace MediaBrowser.Controller.Entities
 
             try
             {
+                if (GetParents().Any(f => f.Id.Equals(Id)))
+                {
+                    throw new InvalidOperationException("Recursive datastructure detected abort processing this item.");
+                }
+
                 await ValidateChildrenInternal2(progress, recursive, refreshChildMetadata, allowRemoveRoot, refreshOptions, directoryService, cancellationToken).ConfigureAwait(false);
             }
             finally