CVE-2026-6607

lm-sys fastchat Worker API Endpoint api_generate resource consumption

MEDIUM
5.3
CVSS Score
Published: April 20, 2026 at 05:00 AM UTC
Updated: June 17, 2026 at 11:01 AM UTC
1 product affected across 1 vendorFastChat

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
SSVC
PoC

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.

Affected

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/358242
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/358242/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/792227
Issue Tracking
Source: cverecord
https://github.com/lm-sys/FastChat/issues/3833
Issue TrackingPatch
Source: cverecord
https://github.com/lm-sys/FastChat/pull/3835
Product
Source: cverecord
https://github.com/lm-sys/FastChat/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-400CWE-404

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