Vulnerability in Vllm-Project Vllm
CVE-2026-9540
A vulnerability was identified in vllm-project vllm 0.19.0. This issue affects some unknown processing of the component OpenAI-compatible Serving Path. Such manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (52.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Vllm-Project Vllm — versions 0.19.0
Weakness classification (CWE)
References
- vuldb.com/vuln/365601 (vdb-entry)
- vuldb.com/vuln/365601/cti (signature, permissions-required)
- vuldb.com/submit/814645 (third-party-advisory)
- github.com/vllm-project/vllm/issues/37343 (issue-tracking, exploit)
- github.com/vllm-project/vllm/pull/37594 (issue-tracking, patch)
- ingero.io/debugging-vllm-latency-minimax-ollama-mcp/ (related)
- github.com/vllm-project/vllm/ (product)
Frequently asked questions
- What is CVE-2026-9540?
- CVE-2026-9540 is a medium-severity vulnerability in Vllm-Project Vllm, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2026-05-26.
- How severe is CVE-2026-9540?
- Medium severity. CVSS v3 base score is 5.3 out of 10.