CriticalVulnerabilityLLM-specific
GHSA-94f4-hr76-p5j6: vLLM: OpenAI auth bypass
- Identifiers
- CVE-2026-48746GHSA-94f4-hr76-p5j6
- Published
- Record updated
- Affected
- vllm >= 0.3.0, < 0.22.0
- Fixed in
- 0.22.0
- released May 29, 2026, 18 days before disclosure
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 1.2%
Summary
GHSA-94f4-hr76-p5j6 is a vulnerability in vLLM's OpenAI-compatible API server that allows authentication bypass of the AuthenticationMiddleware. The flaw stems from starlette reconstructing the URL from an unfiltered Host header on ASGI servers such as uvicorn, letting an attacker control url.path and reach /v1 endpoints without the configured VLLM_API_KEY or --api-key. Instances behind an RFC-conforming web server such as nginx are not affected.
Mitigation
The source does not state a fix yet. Check the original advisory for updates.
Affected packages in the Exposure Registry
Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.
- vllmPyPILLM dependency since 2023-08-25 · 15 tracked dependents
Topics
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