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

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.