CVE-2026-9540: A vulnerability was identified in vllm-project vllm 0.19.0. This issue affects some unknown processing of the component
Summary
A vulnerability (CVE-2026-9540) was found in vllm version 0.19.0 that affects the OpenAI-compatible Serving Path component and can be exploited remotely to cause a denial of service (making a service unavailable by overwhelming it). The vulnerability has a CVSS score (a 0-10 rating of how severe a vulnerability is) of 5.5 (medium severity), and a public exploit is already available.
Solution / Mitigation
A pull request to fix this issue awaits acceptance (mentioned in the source as pending at https://github.com/vllm-project/vllm/pull/37594).
Vulnerability Details
5.3(medium)
EPSS: 0.0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
network
low
none
none
May 26, 2026
Classification
Taxonomy References
Affected Vendors
Related Issues
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Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-9540
First tracked: May 26, 2026 at 11:31 AM
Classified by LLM (prompt v3) · confidence: 85%