vLLM versions through 0.29.0 contain a denial of service vulnerability in the NIXL connector's metadata handling for prefill/decode disaggregated deployments. Attackers can send requests with incomplete kv_transfer_params dictionary entries to trigger an uncaught KeyError in EngineCore scheduling, causing the decode engine to terminate and making all routed requests fail until manual restart.

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History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 22 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
Description vLLM versions through 0.29.0 contain a denial of service vulnerability in the NIXL connector's metadata handling for prefill/decode disaggregated deployments. Attackers can send requests with incomplete kv_transfer_params dictionary entries to trigger an uncaught KeyError in EngineCore scheduling, causing the decode engine to terminate and making all routed requests fail until manual restart.
Title vLLM through 0.29.0 Denial of Service via Incomplete NIXL KV Transfer Metadata
First Time appeared Vllm
Vllm vllm
Weaknesses CWE-248
CPEs cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
Vendors & Products Vllm
Vllm vllm
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-22T13:01:33.609Z

Reserved: 2026-09-21T21:42:24.373Z

Link: CVE-2026-94622

cve-icon Vulnrichment

Updated: 2026-09-22T13:00:12.863Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-21T22:17:00.960

Modified: 2026-09-22T20:25:55.870

Link: CVE-2026-94622

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-21T22:04:10Z

Links: CVE-2026-94622 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T00:30:18Z

Weaknesses