Critical 9.1Published Jun 22, 2026

CVE-2026-48746vLLM: OpenAI auth bypass

Updated under an hour ago (Oct 26, 2026, 3:10 PM ET)

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It affects vllm-project vllm and 10 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for vllm-project vllm

Exploited in the last 30 days

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: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-444, CWE-501
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vllm-project vllm vllm_project:vllm (from the name)	from 0.3.0, < 0.22.0	CNA record
Red Hat Red Hat AI Inference Server 3.2 redhat:ai_inference_server	from 1782951012 not affected; from 1787860580 not affected	CISA ADP
Red Hat Red Hat Ansible Automation Platform 2.6 redhat:ansible_automation_platform	from 1783920640 not affected	CISA ADP
Red Hat Red Hat Migration Toolkit for Applications 8.2 redhat:migration_toolkit_applications	from 1784109883 not affected	CISA ADP
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai	from 1783082430 not affected	CISA ADP
Red Hat Exploit Intelligence redhat:exploit_intelligence	0	CISA ADP
Red Hat OpenShift Lightspeed redhat:openshift_lightspeed	All versions	CISA ADP
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai	3	CISA ADP
Red Hat Red Hat Hardened Images redhat:hummingbird	1	CISA ADP
Red Hat Red Hat Satellite 6 redhat:satellite	6	CISA ADP
1–10 of 11

References

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6	x-refsource-confirm, third-party-advisory
https://github.com/vllm-project/vllm/pull/43426	x-refsource-misc, issue-tracking
https://x41-dsec.de/lab/advisories/x41-2026-002-starlette	x-refsource-misc, third-party-advisory
https://access.redhat.com/errata/RHSA-2026:30088
https://access.redhat.com/errata/RHSA-2026:30089
https://access.redhat.com/errata/RHSA-2026:36005
https://access.redhat.com/errata/RHSA-2026:36006
https://access.redhat.com/errata/RHSA-2026:42132
https://access.redhat.com/errata/RHSA-2026:42142
https://access.redhat.com/errata/RHSA-2026:42644
1–10 of 16

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.