CVE-2024-10907 | Denial of Service (DoS) via Multipart Boundary in lm-sys/fastchat

Exp

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.

Published: 2025-03-20 Last update: 2025-10-15 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2024-10907 is rated High Exploit Risk (66.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.44%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-10907

EDB-ID Source Kind Published Link
nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-10907

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-02 0.90% 0.44% -0.46%
2 2026-04-30 0.18% 0.90% +0.73%
3 2026-04-28 0.18%

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-10907

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-10907

GitHub Security Advisory for CVE-2024-10907

GHSA-qg86-f892-m4hj · Severity: high · Ecosystem: pip — FastChat Uncontrolled Resource Consumption vulnerability

Affected software / configurations for CVE-2024-10907

Vendor Product Version Raw CPE
lm-sys fastchat 0.2.36 cpe:2.3:a:lm-sys:fastchat:0.2.36:*:*:*:*:*:*:*

References for CVE-2024-10907

cvelogic Threat Intelligence