CVE-2026-48746
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| vllm-project | vllm | >= 0.3.0, < 0.22.0 | affected |
Weaknesses
- CWE-444: CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
Additional References
vllm: starlette: vLLM: Critical authentication bypass allows unauthorized API access
Additional References
- https://access.redhat.com/security/cve/CVE-2026-48746
- https://bugzilla.redhat.com/show_bug.cgi?id=2491581
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48746.json
- https://access.redhat.com/errata/RHSA-2026:30089
- https://access.redhat.com/errata/RHSA-2026:30088
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6
- https://github.com/vllm-project/vllm/pull/43426
- https://x41-dsec.de/lab/advisories/x41-2026-002-starlette
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.