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CVE-2026-48746

vLLM: OpenAI auth bypass

Published: Jun 22, 2026Updated: Jul 22, 2026 Sources: CVE List NVDCWE-444
9.1CRITICAL
NVD MITRE
EPSS Score
1.2%
Top 36.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-444CWE-501

Affected Products

vllm-project
oss-projectaka vllm, vllm-project/vllm
vllmMixed
AI / ML / llm-serving-inference
vllm
oss-projectaka aibrix
vllmMixed
AI / ML / llm-serving-inference

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6
github.com
https://github.com/vllm-project/vllm/pull/43426
github.com
https://x41-dsec.de/lab/advisories/x41-2026-002-starlette
x41-dsec.de
and 11 more references View all →
News mentions
1

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