CRITICAL9.1

PYSEC-2026-226

Quick fix

PYSEC-2026-226 — vllm: upgrade to the fixed version with the command below.

pip install --upgrade 'vllm>=0.22.0'

Details

vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/vllm

Introduced in: 0.3.0Fixed in: 0.22.0

Fixpip install --upgrade 'vllm>=0.22.0'

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6[ADVISORY]
https://x41-dsec.de/lab/advisories/x41-2026-002-starlette[ADVISORY]
https://github.com/vllm-project/vllm/pull/43426[REPORT]