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CVE

CVE-2026-48746

vLLM: OpenAI auth bypass
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CVE

CVE-2026-48746

vLLM: OpenAI auth bypass

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 VLLMAPIKEY or --api-key. This vulnerability is fixed in 0.22.0.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Related Resources

No items found.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48746.json, 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, https://access.redhat.com/errata/RHSA-2026:43038, https://access.redhat.com/errata/RHSA-2026:61627, https://access.redhat.com/errata/RHSA-2026:61629, https://access.redhat.com/security/cve/CVE-2026-48746, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48746.json, https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6, https://nvd.nist.gov/vuln/detail/CVE-2026-48746, https://x41-dsec.de/lab/advisories/x41-2026-002-starlette, https://bugzilla.redhat.com/show_bug.cgi?id=2491581, https://github.com/vllm-project/vllm/pull/43426

Severity

9.1

CVSS Score
0
10

Basic Information

Base CVSS
9.1
EPSS Probability
0.01152%
EPSS Percentile
0.6516%
Introduced Version
1af090b57d0e23d268e79941f8084bf0a8ad8621,0
Fix Available
0b3ba88f165976e77ca5e6a7a3f5bba4562b80af,0.18.1-r4,0.19.1-r1,0.20.2-r1,25.11-r10,0.28.0-r0

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