HIGH7.5

PYSEC-2026-1397

FastChat Server-Side Request Forgery vulnerability

Details

A Server-Side Request Forgery (SSRF) vulnerability exists in lm-sys/fastchat version 0.2.36. The vulnerability is present in the `/queue/join?` endpoint, where insufficient validation of the path parameter allows an attacker to send crafted requests. This can lead to unauthorized access to internal networks or the AWS metadata endpoint, potentially exposing sensitive data and compromising internal servers.

Are you affected?

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Affected packages

PyPI/fschat

Introduced in: 0

No fixed version published yet for fschat (pip). Pin to a known-safe version or switch to an alternative.

References

https://nvd.nist.gov/vuln/detail/CVE-2024-11603[ADVISORY]
https://github.com/lm-sys/FastChat[PACKAGE]
https://huntr.com/bounties/89f1158d-4a75-4000-a1bd-f82dd1a62bff[WEB]
https://pypi.org/project/fschat[PACKAGE]
https://github.com/advisories/GHSA-h254-g997-685c[ADVISORY]