Vulnerability · Published Oct 26, 2026 · Assigned by GitHub_M
CVE-2026-115917vLLM: Permissive default CORS origins allow cross-origin requests to the vLLM HTTP server
Low 3.4
In plain English
A low-severity security flaw in vllm from vllm-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | vllm | 0.32.0 | GHSA-vvpg-rrww-wpmh |
| PyPI | vllm | 0.32.0 | PYSEC-2026-4348 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| vllm-project | vllm | < 0.32.0 |
Weakness: CWE-942 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-vvpg-rrww-wpmh x_refsource_CONFIRM
- https://github.com/vllm-project/vllm/pull/61009 x_refsource_MISC
- https://github.com/vllm-project/vllm/commit/fcae5c98870ff2c20659731dce7ba3a3ff0d48aa x_refsource_MISC
- https://github.com/vllm-project/vllm/releases/tag/v0.32.0 x_refsource_MISC