Vulnerability Monitor

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CVE-2025-48944

vLLM is an inference and serving engine for large language models (LLMs). In version 0.8.0 up to but excluding 0.9.0, the vLLM backend used with the /v1/chat/completions OpenAPI endpoint fails to validate unexpected or malformed input in the "pattern" and "type" fields when the tools functionality is invoked. These inputs are not validated before being compiled or parsed, causing a crash of the inference worker with a single request. The worker will remain down until it is restarted. Version 0.9.0 fixes the issue.

Published

2025-05-30T19:15:30.433

Last Modified

2025-07-01T20:42:13.840

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

Weaknesses

Type: Secondary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	vllm	vllm	< 0.9.0	Yes

References

https://github.com/vllm-project/vllm/pull/17623 Issue Tracking, Vendor Advisory ([email protected])
https://github.com/vllm-project/vllm/security/advisories/GHSA-vrq3-r879-7m65 Exploit, Vendor Advisory ([email protected])