CVE-2026-6607
Severity CVSS v4.0:
MEDIUM
Type:
CWE-400
Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
20/04/2026
Last modified:
22/04/2026
Description
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.
Impact
Base Score 4.0
5.50
Severity 4.0
MEDIUM
Base Score 3.x
5.30
Severity 3.x
MEDIUM
Base Score 2.0
5.00
Severity 2.0
MEDIUM
References to Advisories, Solutions, and Tools
- https://gist.github.com/YLChen-007/87216a2d97a882d619e11dc67cd473b5
- https://github.com/lm-sys/FastChat/
- https://github.com/lm-sys/FastChat/commit/c9e84b89c91d45191dc24466888de526fa04cf33
- https://github.com/lm-sys/FastChat/issues/3833
- https://github.com/lm-sys/FastChat/pull/3835
- https://vuldb.com/submit/792227
- https://vuldb.com/vuln/358242
- https://vuldb.com/vuln/358242/cti