{"id":"CVE-2026-116173","title":"vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids","summary":"vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-20","CWE-248"],"vendor":"vllm-project","product":"vllm","affected":["vllm >= 0.22.0 < 0.24.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T19:39:11.858594Z"},"published":"2026-10-25","updated":"2026-10-26","sourceUpdated":"2026-10-26T19:48:36.065Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116173","references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-6pgw-f3pv-4h8q","label":"GitHub Security Advisory (GHSA-6pgw-f3pv-4h8q)"},{"url":"https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-grpc-output-candidates-token-ids","label":"VulnCheck Advisory: vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116173.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-116173"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2560420"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116173"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116173"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00348,"epssPercentile":0.28184,"ingestedAt":"2026-10-25T22:08:29.947Z","slug":"CVE-2026-116173","body":"## Overview\n\nvLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids, triggering a fatal sampler exception that crashes the engine.\n\n## Affected\n\n- `vllm >= 0.22.0 < 0.24.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · updated 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116173.json)","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}