{"id":"CVE-2026-94622","published":"2026-09-21T22:17:00.960","lastModified":"2026-09-21T22:17:00.960","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-248"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vllm-project/vllm","tags":[]},{"url":"https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/metadata.py#L294-L312","tags":[]},{"url":"https://github.com/vllm-project/vllm/pull/54807","tags":[]},{"url":"https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-incomplete-nixl-kv-transfer-metadata","tags":[]}],"exploitRefs":[{"url":"https://github.com/vllm-project/vllm","tags":[]},{"url":"https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/metadata.py#L294-L312","tags":[]},{"url":"https://github.com/vllm-project/vllm/pull/54807","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows attackers to cause a denial of service by sending requests with incomplete metadata entries, leading to engine termination and failure of routed requests.","exploitability":"Exploitation requires sending specific malformed requests; manual restarts are needed to recover from the issue.","blast_radius":"If exploited, it could disrupt all routed requests until a manual restart is performed, impacting service availability.","remediation":"Update to vLLM version 0.30.0 or later to address the vulnerability.","tags":["dos","metadata","vllm"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:14:46.321Z"}}