{"id":"CVE-2026-55514","summary":"vLLM denial of service via prompt embeds on M-RoPE models","details":"vLLM is a library for LLM inference and serving. From 0.12.0 to before 0.24.0, sending a pure prompt embeds payload in a /v1/completions request with a model using M-RoPE causes EngineCore to fail an assertion and fatally crash, shutting down the entire server application. Any remote user who is authorized to make a /v1/completions request can make such a request and induce a crash. This issue is fixed in version 0.24.0.","aliases":["GHSA-33cg-gxv8-3p8g","PYSEC-2026-2303"],"modified":"2026-07-13T07:26:12.683023961Z","published":"2026-07-06T20:07:40.405Z","database_specific":{"cwe_ids":["CWE-617"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55514.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/vllm-project/vllm/releases/tag/v0.24.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55514.json"},{"type":"ADVISORY","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55514"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/pull/45252"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vllm-project/vllm","events":[{"introduced":"4fd9d6a85c00ac0186aa9abbeff73fc2ac6c721e"},{"fixed":"217c64a976869883fcf0c52a8cf8bc3c954d285b"},{"fixed":"470229c37efaf69c86e8bc97482b0b1ff7551c65"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"extracted_events":[{"introduced":"0.12.0"},{"fixed":"0.24.0"}],"cpe":"cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55514.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}