{"action":"Upgrade vllm to 0.30.0 or later.","affected":[{"fixed":"0.30.0","introduced":"0"}],"component":"vllm","cve_ids":["CVE-2026-94623"],"ecosystem":"PyPI","epss":0.00627,"exploited":false,"fixed_versions":["0.30.0"],"id":"tcs_01M5KH97FENHEDN9R7WYA7JDH2","modified_at":"2026-09-30T09:15:02.789719832Z","published_at":"2026-09-21T22:17:01.123Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4005","https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/base_worker.py#L2642-L2646","https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-nixl-multi-prompt-assertion-failure","https://github.com/vllm-project/vllm/pull/51505","https://github.com/vllm-project/vllm"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-4005","url":"https://osv.dev/vulnerability/PYSEC-2026-4005"}],"summary":"vLLM through 0.29.0 contains a denial of service vulnerability in the NIXL connector's prefix caching implementation that fails to properly validate block counts across multi-prompt completion request"}