PT-2026-33713 · Lmsys · Fastchat

Eric-F · Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-6607

NVD

CVSS v2.0

5.0

Medium

AV:N/AC:L/Au:N/C:N/I:N/A:P

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function api generate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in api generate of base model worker.py and did miss other entry points.

Exploit

Fix

Improper Resource Release

Resource Exhaustion

Weakness Enumeration

CWE-404

CWE-400

Related Identifiers

CVE-2026-6607

Affected Products

Fastchat

References · 9

• 🔥 https://gist.github.com/YLChen-007/87216a2d97a882d619e11dc67cd473b5 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-6607 · Security Note
• https://github.com/lm-sys/FastChat/pull/3835 · Patch
• https://github.com/lm-sys/FastChat/commit/c9e84b89c91d45191dc24466888de526fa04cf33 · Patch
• https://vuldb.com/vuln/358242 · Note
• https://github.com/lm-sys/FastChat/issues/3833 · Note
• https://vuldb.com/vuln/358242/cti · Note
• https://vuldb.com/submit/792227 · Note
• https://github.com/lm-sys/FastChat · Note