From 14c5b6570496f964dc13eb1d43f06d40a7d90f78 Mon Sep 17 00:00:00 2001
From: Classic298 <27028174+Classic298@users.noreply.github.com>
Date: Thu, 24 Sep 2026 05:55:07 +0200
Subject: [PATCH] refac: tighten details and image patterns in background task
 message cleanup (#30394)

The patterns that remove details blocks and inline images from task messages now stop at the next details tag, bracket or parenthesis.
---
 backend/open_webui/utils/middleware.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index d8ed066c96..164ec4d3a1 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -3865,7 +3865,7 @@ async def background_tasks_handler(ctx):
 
             if isinstance(content, str):
                 content = re.sub(
-                    r'<details\b[^>]*>.*?<\/details>|!\[.*?\]\(.*?\)',
+                    r'<details\b[^<>]*>(?:(?!<details\b).)*?<\/details>|!\[[^\[\]]*\]\([^()]*\)',
                     '',
                     content,
                     flags=re.S | re.I,