VULNERABILITY INTELLIGENCE

CVE-2025-48942

CVSS score6.5 MEDIUM

EPSS probability0.57%

CISA KEVNot currently listed

Published2025-05-30

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

vLLM is an inference and serving engine for large language models (LLMs). In versions 0.8.0 up to but excluding 0.9.0, hitting the /v1/completions API with a invalid json_schema as a Guided Param kills the vllm server. This vulnerability is similar GHSA-9hcf-v7m4-6m2j/CVE-2025-48943, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.

Weakness classification

security-advisories@github.com: CWE-248

Primary references

security-advisories@github.com — Patch
security-advisories@github.com — Issue Tracking
security-advisories@github.com — Issue Tracking, Patch
security-advisories@github.com — Exploit, Vendor Advisory