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OpenAdvisories
Low · 3.4 CVE-2026-115917 EUVD-2026-110038GHSA-vvpg-rrww-wpmhPYSEC-2026-4348

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

Published Oct 26, 2026 · Updated Oct 31, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
vllm-project vllm < 0.32.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI vllm < 0.32.0 0.32.0 GHSA-vvpg-rrww-wpmh

Advisories 1

References