Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vllm | Vllm | <= 0.29.0 |
Related Weaknesses (CWE)
References
- https://github.com/vllm-project/vllmProduct
- https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kProduct
- https://github.com/vllm-project/vllm/pull/54807Issue TrackingPatch
- https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-iThird Party Advisory
FAQ
What is CVE-2026-94622?
CVE-2026-94622 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 incomple...
How severe is CVE-2026-94622?
CVE-2026-94622 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-94622?
Check the references section above for vendor advisories and patch information. Affected products include: Vllm Vllm.