CVE-2025-48944: vLLM crash through malformed tool input on /v1/chat/completions

Summary

CVE-2025-48944 affects vLLM versions 0.8.0 up to but excluding 0.9.0. The vLLM backend behind the /v1/chat/completions OpenAPI endpoint does not validate unexpected or malformed input in the "pattern" and "type" fields when the tools functionality is invoked. A single crafted request crashes the inference worker, which stays down until it is restarted.

Mitigation

Fixed in 0.9.0.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• vllmPyPILLM dependency since 2023-08-25 · 15 tracked dependents

Topics

• Inference infrastructure

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