CVE-2024-10907

Denial of Service (DoS) via Multipart Boundary in lm-sys/fastchat

HIGH
7.5
CVSS Score
Published: March 20, 2025 at 10:10 AM UTC
Updated: June 17, 2026 at 06:56 AM UTC
1 product affected across 1 vendorFastChat

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Severity
HIGH7.5
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinite loop, leading to excessive resource consumption and a complete denial of service (DoS) for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ latest0.2.36

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH@huntr_ai
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-835

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