CVE-2026-94622
7.5 HIGHpublic exploit availablePublished 2026-09-21 · Updated 2026-09-21
AI risk analysis
- 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.
- Prioritized remediation
- Update to vLLM version 0.30.0 or later to address the vulnerability.
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-248
Public exploit & PoC references
All references
- https://github.com/vllm-project/vllm
- https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/metadata.py#L294-L312
- https://github.com/vllm-project/vllm/pull/54807
- https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-incomplete-nixl-kv-transfer-metadata
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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