CVE-2025-48943 – Apache vLLM Regex Denial of Service Vulnerability

CVE ID : CVE-2025-48943

Published : May 30, 2025, 7:15 p.m. | 44 minutes ago

Description : vLLM is an inference and serving engine for large language models (LLMs). Version 0.8.0 up to but excluding 0.9.0 have a Denial of Service (ReDoS) that causes the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to GHSA-6qc9-v4r8-22xg/CVE-2025-48942, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.

Severity: 6.5 | MEDIUM

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