CVE-2026-115917
vLLM: Permissive default CORS origins allow cross-origin requests to the vLLM HTTP server
- State
- Published
- Severity
- 3.4 Low
- Published
- Oct 26, 2026
- Updated
- Oct 31, 2026
- Reserved
- Oct 23, 2026
Description
vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the OpenAI-compatible server configures Starlette CORSMiddleware with allowed_origins set to a wildcard by default. A malicious web page can use a victim's browser to reach an unauthenticated vLLM server on localhost, an internal network, or a VPN, call endpoints including GET /v1/models and POST /v1/chat/completions, consume GPU resources, and read responses. Cookie-based cross-site request forgery does not apply because credentials are disabled by default, and deployments requiring bearer authentication are exposed only when the caller already has a usable token. This issue is fixed in version 0.32.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.4 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-942 Permissive Cross-domain Policy with Untrusted Domains
Affected Products
| Product | Versions |
|---|---|
vllmvllm-project |
|
References
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