CVE-2024-12376: A Server-Side Request Forgery (SSRF) vulnerability was identified in the lm-sys/fastchat web server, specifica

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2024-12376 is a high-severity flaw (CVSS 7.5) affecting fastchat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-918
Published	2025-03-20
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: lm-sys

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-20 10:15 UTCPublished CVE record published
2026-06-17 06:59 UTCUpdated Record last modified

lm-sys fastchat DOWNGRADE

Affected: 2024-10-05

Fixed in: no fixed release known

Safe to downgrade to: a release before 2024-10-05

1. Check installed version

apt-cache policy fastchat || rpm -q fastchat || fastchat --version

2. No fixed release: DOWNGRADE to a release before 2024-10-05 (Debian / Ubuntu)

apt-cache madison fastchat sudo apt install fastchat=<VERSION_BEFORE_2024-10-05> sudo apt-mark hold fastchat

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fastchat sudo dnf downgrade fastchat-<VERSION_BEFORE_2024-10-05> sudo dnf versionlock add fastchat

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-12376?

fastchat: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-12376 being exploited?

CVE-2024-12376 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-12376 affect?

CVE-2024-12376 affects fastchat. Severity is high (CVSS 7.5). 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 a

How urgent is CVE-2024-12376?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Git vulnerabilities · AWS vulnerabilities

Related CVEs

CVE-2024-11603 HIGH 7.5 DOWNGRADE A Server-Side Request Forgery (SSRF) vulnerability exists in lm-sys/fastchat version 0.2.36
CVE-2024-10912 HIGH 7.5 DOWNGRADE A Denial of Service (DoS) vulnerability exists in the file upload feature of lm-sys/fastchat version 0.2.36
CVE-2024-10908 MEDIUM 6.1 DOWNGRADE An open redirect vulnerability in lm-sys/fastchat Release v0.2.36 allows a remote unauthenticated attacker to
CVE-2024-10907 HIGH 7.5 DOWNGRADE In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of mul
CVE-2024-10044 CRITICAL 9.3 DOWNGRADE A Server-Side Request Forgery (SSRF) vulnerability exists in the POST /worker_generate_stream API endpoint of

References

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