CVE WatchSep 1, 2026

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 s

CVSS

9.1

Critical

EPSS

1.2%

p65

KEV

—

Exploit Today

0-100

Published: Jun 22, 2026 · Last modified: Sep 1, 2026 · CWE-444 · CWE-501

EPSS · 30d

1.2%EPSS · 30 days1.2%

2026-08-132026-09-10

Technical description

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.

Official references

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CVECVSSEPSSKEVRExploitTitleMod.

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25.7%

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