PYSEC-2026-2025
vLLM Denial of Service via the best_of parameter
En bref
- Publiée
- Mise à jour
- CVE
- CVE-2024-8939
- Alias
- GHSA-wc36-9694-f9rf
- CVSS_V3
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS_V4
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
A vulnerability was found in the ilab model serve component, where improper handling of the best_of parameter in the vllm JSON web API can lead to a Denial of Service (DoS). The API used for LLM-based sentence or chat completion accepts a best_of parameter to return the best completion from several options. When this parameter is set to a large value, the API does not handle timeouts or resource exhaustion properly, allowing an attacker to cause a DoS by consuming excessive system resources. This leads to the API becoming unresponsive, preventing legitimate users from accessing the service.
Paquets affectés
| Paquet | Versions |
|---|---|
| PyPI · vllm | introduced 0, last affected 0.5.0.post1 |
Références
- https://nvd.nist.gov/vuln/detail/CVE-2024-8939 ADVISORY
- https://github.com/vllm-project/vllm/issues/6137 WEB
- https://access.redhat.com/security/cve/CVE-2024-8939 WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2312782 WEB
- https://github.com/vllm-project/vllm PACKAGE
- https://pypi.org/project/vllm PACKAGE
- https://github.com/advisories/GHSA-wc36-9694-f9rf ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |