Vulnerability Details CVE-2026-48746
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 49.8%
CVSS Severity
CVSS v3 Score 9.1