CVE-2026-6608

MEDIUM EPSS 22.4%
Published Apr 20, 20262mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 4.0
Medium
Find Similar
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
22.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-670

References 6

  • gist.github.com https://gist.github.com/YLChen-007/e45039d23e698222d887ee09735d9d36
  • github.com https://github.com/lm-sys/FastChat/
  • github.com https://github.com/lm-sys/FastChat/issues/3834
  • vuldb.com https://vuldb.com/submit/792228
  • vuldb.com https://vuldb.com/vuln/358243
  • vuldb.com https://vuldb.com/vuln/358243/cti

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.