CVE-2026-94622
HIGHCVSS 7.5Description
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.
Timeline
Published:September 21st, 2026 10:17 PM
Last modified:September 29th, 2026 12:47 PM
CVSS Scoring
CVSS v3: 7.5 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
From NVD CPE configuration data
Vendors
vllm
Products
vllm
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://github.com/vllm-project/vllmProduct
- https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/metadata.py#L294-L312Product
- https://github.com/vllm-project/vllm/pull/54807Issue Tracking
- https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-incomplete-nixl-kv-transfer-metadataThird Party Advisory
Source: NIST NVD · Data may lag official sources by up to one minute