GHSA-f3q6-69f3-vwchMediumCVSS 5.3

FastChat has a Content Moderation Bypass via Arena Side-by-Side Views

Published
April 20, 2026
Last Modified
April 23, 2026

🔗 CVE IDs covered (1)

📋 Description

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed.

🎯 Affected products1

  • pip/fschat:<= 0.2.36

🔗 References (8)