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CVE-2026-6607

5.3 · MEDIUM

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36.

Published Apr 20, 2026CWE-400EPSS 0.74%

Overview

CVE-2026-6607 is a medium-severity vulnerability. It was published on April 20, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/YLChen-007/87216a2d97a882d619e11dc67cd473b5GitHubgithub.com/lm-sys/FastChat/GitHubgithub.com/lm-sys/FastChat/commit/c9e84b89c91d45191dc24466888de526fa04cf33GitHubgithub.com/lm-sys/FastChat/issues/3833GitHubgithub.com/lm-sys/FastChat/pull/3835Refvuldb.com/submit/792227Refvuldb.com/vuln/358242Refvuldb.com/vuln/358242/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-6607?

CVE-2026-6607 is a medium-severity vulnerability. It was published on April 20, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-6607?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-6607?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-6607?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-6607 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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