CVE-2026-6607

MEDIUM

lm-sys fastchat Worker API Endpoint api_generate resource consumption

Title source: cna

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.

Scores

CVSS v3 5.3
EPSS 0.0002
EPSS Percentile 4.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Details

CWE
CWE-400 CWE-404
Status published
Products (38)
lm-sys/fastchat 0.2.0
lm-sys/fastchat 0.2.1
lm-sys/fastchat 0.2.10
lm-sys/fastchat 0.2.11
lm-sys/fastchat 0.2.12
lm-sys/fastchat 0.2.13
lm-sys/fastchat 0.2.14
lm-sys/fastchat 0.2.15
lm-sys/fastchat 0.2.16
lm-sys/fastchat 0.2.17
... and 28 more
Published Apr 20, 2026
Tracked Since Apr 20, 2026