---
id: CVE-2024-11603
aliases:
  - GHSA-h254-g997-685c
  - PYSEC-2026-1397
title: FastChat Server-Side Request Forgery vulnerability
summary: FastChat Server-Side Request Forgery vulnerability
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
vendor: fschat
product: fschat
ecosystem: pip
affected:
  - fschat <= 0.2.36
published: '2025-03-20'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-h254-g997-685c'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-11603'
  - url: 'https://github.com/lm-sys/FastChat'
  - url: 'https://huntr.com/bounties/89f1158d-4a75-4000-a1bd-f82dd1a62bff'
tags:
  - osv
  - pip
epss: 0.00686
epssPercentile: 0.50597
ingestedAt: '2026-07-08T18:25:49.960Z'
---

## Overview

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.

## Affected packages

- `fschat <= 0.2.36`

## Remediation

Refer to the advisory for the patched release.