Vulnerability in Vllm
CVE-2025-71379
vLLM versions >= 0.6.3 and < 0.9.0 contain multiple regular expression denial of service (ReDoS) vulnerabilities. Several regex patterns — in vllm/lora/utils.py, the phi4mini tool parser, and the OpenAI-compatible serving chat endpoint — a…
Vulnerability class: ReDoS (Regular Expression Denial of Service)
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Vllm — versions 0.6.3, 0.9.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71379?
- CVE-2025-71379 is a medium-severity vulnerability in Vllm, classified under Inefficient Regular Expression Complexity. CVSS score: 4.3/10. Published 2026-06-20.
- How severe is CVE-2025-71379?
- Medium severity. CVSS v3 base score is 4.3 out of 10.