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.

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 remot…

EPSS: 0.001 (22.8th percentile) — read the EPSS interpretation.

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.

Affected products

Vllm-project Vllm — versions 0.19.0

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

cna@vuldb.com (vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (issue-tracking, patch)
cna@vuldb.com (related)
cna@vuldb.com (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.