{"id":"CVE-2026-55514","state":"PUBLISHED","title":"vLLM denial of service via prompt embeds on M-RoPE models","description":"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.","publishedAt":"2026-07-06T20:07:40.405Z","updatedAt":"2026-07-06T20:46:52.405Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["vllm-project vllm"],"affected":[{"vendor":"vllm-project","product":"vllm","versions":[{"version":">= 0.12.0, < 0.24.0","status":"affected"}]}],"references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g","https://github.com/vllm-project/vllm/pull/45252","https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65","https://github.com/vllm-project/vllm/releases/tag/v0.24.0"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55514.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55514","state":"PUBLISHED","datePublished":"2026-07-06T20:07:40.405Z","dateUpdated":"2026-07-06T20:46:52.405Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T22:44:22.284Z"},"containers":{"cna":{"title":"vLLM denial of service via prompt embeds on M-RoPE models","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"vllm-project","product":"vllm","versions":[{"version":">= 0.12.0, < 0.24.0","status":"affected"}]}],"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g","name":"https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/vllm-project/vllm/pull/45252","name":"https://github.com/vllm-project/vllm/pull/45252","tags":["x_refsource_MISC"]},{"url":"https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65","name":"https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65","tags":["x_refsource_MISC"]},{"url":"https://github.com/vllm-project/vllm/releases/tag/v0.24.0","name":"https://github.com/vllm-project/vllm/releases/tag/v0.24.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","lang":"en","description":"CWE-617: Reachable Assertion","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-06T20:07:40.405Z"},"source":{"advisory":"GHSA-33cg-gxv8-3p8g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T20:45:29.132412Z","id":"CVE-2026-55514","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-06T20:46:52.405Z"}}]}}}