CVE-2026-9540

vllm-project vllm OpenAI-compatible Serving Path denial of service

MEDIUM
5.3
CVSS Score
Published: May 26, 2026 at 10:30 AM UTC
Updated: July 23, 2026 at 07:32 PM UTC
1 product affected across 1 vendorvLLM

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/365601
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/365601/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/814645
ExploitIssue Tracking
Source: cverecord
https://github.com/vllm-project/vllm/issues/37343
Issue TrackingPatch
Source: cverecord
https://github.com/vllm-project/vllm/pull/37594

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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