CVE-2024-12376: Fschat FastChat Server-Side Request Forgery Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-g44m-hpf4-vmrp
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CVSS 7.5
CWE-918
Published
Advisory Summary

CVE-2024-12376 is a HIGH (CVSS 7.5) fastchat server-side request forgery vulnerability vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Fschat libraries in the PyPI ecosystem. The issue involves fastchat server-side request forgery vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2024-12376 at a Glance

CVE Identifier CVE-2024-12376
GHSA Identifier GHSA-g44m-hpf4-vmrp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Fschat
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2024-12376

To remediate this vulnerability, upgrade all affected Fschat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

fschat fixed: Latest secure release 
pip install fschat>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show fschat

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2024-12376, inspect your installed packages using pip:

pip show fschat

Analyze the terminal output to locate any version of Fschat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show fschat command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Fschat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A Server-Side Request Forgery (SSRF) vulnerability was identified in the lm-sys/fastchat web server, specifically in the affected version git 2c68a13. This vulnerability allows an attacker to access internal server resources and data that are otherwise inaccessible, such as AWS metadata credentials.

CVE-2024-12376 Affected Fschat Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
fschat
pypi/fschat
PyPI
≤ 0.2.36

References

NVD — CVE-2024-12376 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-12376
Fschat Source Repository REPOSITORY
https://github.com/lm-sys/FastChat
huntr.com/bounties/c9cc3f28-e... WEB
https://huntr.com/bounties/c9cc3f28-ee9f-4d2d-9ee5-8c6455a11892

Frequently Asked Questions

What is CVE-2024-12376?
CVE-2024-12376 is a security vulnerability in Fschat involving FastChat Server-Side Request Forgery vulnerability under CWE-918: Server-Side Request Forgery (SSRF).
Which Fschat versions are affected?
Affected versions include releases prior to current release patches across affected packages: fschat.
What version fixes CVE-2024-12376?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is fschat affected?
Yes, fschat is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-12376?
CVE-2024-12376 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2024-12376?
CVE-2024-12376 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check PyPI dependencies for CVE-2024-12376?
Run the dependency tree command: 'pip show fschat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g44m-hpf4-vmrp",
  "modified" : "2025-03-21T16:41:12Z",
  "published" : "2025-03-20T12:32:43Z",
  "aliases" : [ "CVE-2024-12376" ],
  "summary" : "FastChat Server-Side Request Forgery vulnerability",
  "details" : "A Server-Side Request Forgery (SSRF) vulnerability was identified in the lm-sys/fastchat web server, specifically in the affected version git 2c68a13. This vulnerability allows an attacker to access internal server resources and data that are otherwise inaccessible, such as AWS metadata credentials.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "fschat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.2.36"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-12376"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/lm-sys/FastChat"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/c9cc3f28-ee9f-4d2d-9ee5-8c6455a11892"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-21T16:41:12Z",
    "nvd_published_at" : "2025-03-20T10:15:27Z"
  }
}