CVE-2026-115917

LOW 3.4

vLLM: Permissive default CORS origins allow cross-origin requests to the vLLM HTTP server

CVSS Score

3.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-942
Vendor	vllm-project
Product	vllm
Published	Oct 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

vllm-project / vllm

< 0.32.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/vllm-project/vllm/security/advisories/GHSA-vvpg-rrww-wpmh github.com: https://github.com/vllm-project/vllm/pull/61009 github.com: https://github.com/vllm-project/vllm/commit/fcae5c98870ff2c20659731dce7ba3a3ff0d48aa github.com: https://github.com/vllm-project/vllm/releases/tag/v0.32.0