Medium 5.3Published May 26, 2026

CVE-2026-9540vllm-project vllm OpenAI-compatible Serving Path denial of service

Updated under an hour ago (Oct 26, 2026, 8:20 PM ET)

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Every CVE for vllm-project vllm

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
Weakness (CWE): CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: May 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vllm-project vllm vllm-project:vllm	0.19.0	CNA record

References

References

https://vuldb.com/vuln/365601	vdb-entry
https://vuldb.com/vuln/365601/cti	signature, permissions-required
https://vuldb.com/submit/814645	third-party-advisory
https://github.com/vllm-project/vllm/issues/37343	exploit, issue-tracking
https://github.com/vllm-project/vllm/pull/37594	issue-tracking, patch
https://ingero.io/debugging-vllm-latency-minimax-ollama-mcp/	related
https://github.com/vllm-project/vllm/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.