{"id":"CVE-2026-114051","title":"vLLM before 0.31.0 Denial of Service via min_tokens in /inference/v1/generate","summary":"vLLM before 0.31.0 skips the min_tokens <= max_tokens check for /inference/v1/generate requests with a null max_tokens, so the EngineCore input thread later dies on an uncaught VLLMValidationError while /health still returns 200. Unauthe…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-248"],"vendor":"vllm-project","product":"vllm","affected":["vllm < 0.31.0"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T00:36:28.373Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114051","references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-4xqp-c3mv-qff7","label":"GitHub Security Advisory (GHSA-4xqp-c3mv-qff7)"},{"url":"https://www.vulncheck.com/advisories/vllm-before-0.31.0-denial-of-service-via-min-tokens-in-inference-v1-generate","label":"VulnCheck Advisory: vLLM before 0.31.0 Denial of Service via min_tokens in /inference/v1/generate"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T01:37:08.043Z","slug":"CVE-2026-114051","body":"## Overview\n\nvLLM before 0.31.0 skips the min_tokens <= max_tokens check for /inference/v1/generate requests with a null max_tokens, so the EngineCore input thread later dies on an uncaught VLLMValidationError while /health still returns 200. Unauthenticated remote attackers can send one request with an oversized min_tokens to hang all subsequent generation requests until manual restart.\n\n## Affected\n\n- `vllm < 0.31.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}