Cloudanix VulnDB

CVE-2025-71379

Medium · 4.3

CVSS

4.3

EPSS

0.5%

Published

Jun 20, 2026

CISA due date

—

The record

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 — are susceptible to catastrophic backtracking. An attacker submitting crafted input with nested or repeated structures can trigger severe CPU consumption and performance degradation, resulting in denial of service.

Affected packages

Ecosystem Package Introduced Fixed

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