CVE-2026-6608 PUBLISHED

lm-sys fastchat Arena Side-by-Side View add_text control flow

Assigner: VulDB
Reserved: 19.04.2026 Published: 20.04.2026 Updated: 20.04.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 6.9

Product Status

Vendor lm-sys
Product fastchat
Versions
  • Version 0.2.0 is affected
  • Version 0.2.1 is affected
  • Version 0.2.2 is affected
  • Version 0.2.3 is affected
  • Version 0.2.4 is affected
  • Version 0.2.5 is affected
  • Version 0.2.6 is affected
  • Version 0.2.7 is affected
  • Version 0.2.8 is affected
  • Version 0.2.9 is affected
  • Version 0.2.10 is affected
  • Version 0.2.11 is affected
  • Version 0.2.12 is affected
  • Version 0.2.13 is affected
  • Version 0.2.14 is affected
  • Version 0.2.15 is affected
  • Version 0.2.16 is affected
  • Version 0.2.17 is affected
  • Version 0.2.18 is affected
  • Version 0.2.19 is affected
  • Version 0.2.20 is affected
  • Version 0.2.21 is affected
  • Version 0.2.22 is affected
  • Version 0.2.23 is affected
  • Version 0.2.24 is affected
  • Version 0.2.25 is affected
  • Version 0.2.26 is affected
  • Version 0.2.27 is affected
  • Version 0.2.28 is affected
  • Version 0.2.29 is affected
  • Version 0.2.30 is affected
  • Version 0.2.31 is affected
  • Version 0.2.32 is affected
  • Version 0.2.33 is affected
  • Version 0.2.34 is affected
  • Version 0.2.35 is affected
  • Version 0.2.36 is affected

Credits

  • Eric-f (VulDB User) reporter

References

Problem Types

  • Incorrect Control Flow CWE