Vulnerability in Vllm-Project Vllm
CVE-2026-115917
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Vllm-Project Vllm — versions < 0.32.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-115917?
- CVE-2026-115917 is a low-severity vulnerability in Vllm-Project Vllm, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 3.4/10. Published 2026-10-26.
- How severe is CVE-2026-115917?
- Low severity. CVSS v3 base score is 3.4 out of 10.