{"id":"CVE-2026-116172","state":"PUBLISHED","title":"vLLM 0.22.0 before 0.24.0 DoS via Rust gRPC CandidateTokens.top_n","description":"vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote attackers to bypass max_logprobs limits via CandidateTokens.top_n. Attackers can send Generate or GenerateStream requests with oversized or integer-wrapping top_n values to trigger torch.topk failures that terminate EngineCore.","publishedAt":"2026-10-25T13:20:13.759Z","updatedAt":"2026-10-25T13:20:13.759Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["vllm-project vllm"],"affected":[{"vendor":"vllm-project","product":"vllm","packageURL":"pkg:pypi/vllm","defaultStatus":"unaffected","versions":[{"version":"0.22.0","status":"affected","lessThan":"0.24.0","versionType":"semver"},{"version":"0.24.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-rwfw-xvg3-3937","https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-dos-via-rust-grpc-candidatetokens-top-n"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116172.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116172","state":"PUBLISHED","datePublished":"2026-10-25T13:20:13.759Z","dateUpdated":"2026-10-25T13:20:13.759Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-25T12:25:26.984Z"},"containers":{"cna":{"title":"vLLM 0.22.0 before 0.24.0 DoS via Rust gRPC CandidateTokens.top_n","descriptions":[{"lang":"en","value":"vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote attackers to bypass max_logprobs limits via CandidateTokens.top_n. Attackers can send Generate or GenerateStream requests with oversized or integer-wrapping top_n values to trigger torch.topk failures that terminate EngineCore."}],"affected":[{"vendor":"vllm-project","product":"vllm","packageURL":"pkg:pypi/vllm","defaultStatus":"unaffected","versions":[{"version":"0.22.0","status":"affected","lessThan":"0.24.0","versionType":"semver"},{"version":"0.24.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-rwfw-xvg3-3937","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-rwfw-xvg3-3937)"},{"url":"https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-dos-via-rust-grpc-candidatetokens-top-n","name":"VulnCheck Advisory: vLLM 0.22.0 before 0.24.0 DoS via Rust gRPC CandidateTokens.top_n","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-25T13:20:13.759Z"},"datePublic":"2026-10-09T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*","versionStartIncluding":"0.22.0","versionEndExcluding":"0.24.0"}]}]}],"credits":[{"lang":"en","value":"rexpository","type":"reporter"},{"lang":"en","value":"jperezdealgaba","type":"coordinator"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}