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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-115917
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-26 18:17:39 UTC
Updated2026-10-26 18:34:17 UTC
DescriptionvLLM 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.

Risk And Classification

Primary CVSS: v3.1 3.4 LOW from [email protected]

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

Problem Types: CWE-942 | CWE-942 CWE-942: Permissive Cross-domain Policy with Untrusted Domains

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
3.1CNADECLARED3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Vllm-project Vllm affected < 0.32.0 Not specified

References

ReferenceSourceLinkTags
github.com/vllm-project/vllm/releases/tag/v0.32.0 [email protected] github.com
github.com/vllm-project/vllm/commit/fcae5c98870ff2c20659731dce7ba3a3ff0d... [email protected] github.com
github.com/vllm-project/vllm/pull/61009 [email protected] github.com
github.com/vllm-project/vllm/security/advisories/GHSA-vvpg-rrww-wpmh [email protected] github.com
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