7.5
/ 10
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Description
vLLM is an inference and serving engine for large language models (LLMs). Before version 0.11.0rc2, the API key support in vLLM performs validation using a method that was vulnerable to a timing attack. API key validation uses a string comparison that takes longer the more characters the provided API key gets correct. Data analysis across many attempts could allow an attacker to determine when it finds the next correct character in the key sequence. Deployments relying on vLLM's built-in API key validation are vulnerable to authentication bypass using this technique. Version 0.11.0rc2 fixes the issue.
Basic Information
ID
CVE-2025-59425
Source
GitHub_M
Published
Oct 7, 2025 at 14:06
Affected Product
Vendor
vllm-project
Product
vllm
Version
< 0.11.0rc2
Affected Versions
vllm-project vllm < 0.11.0rc2
CWE Classification
References
- github.com /vllm-project/vllm/security/advisories/GHSA-wr9h-g72x-mwhm
- github.com /vllm-project/vllm/commit/ee10d7e6ff5875386c7f136ce8b5f525c8fcef48
- github.com /vllm-project/vllm/blob/4b946d693e0af15740e9ca9c0e059d5f333b1083/vllm/entrypoints/openai/api_server.py
- github.com /vllm-project/vllm/releases/tag/v0.11.0