CVE-2026-48746

CRITICAL EPSS 49.8%
Published Jun 22, 20261w ago · Modified Jun 23, 20261w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Jun 22, 2026 1w ago
Last Modified Jun 23, 2026 1w ago

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.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
49.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-444

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.