{"id":"CVE-2026-114049","revision":"4c0b6a0b74f04db79c2d7e401780ee54","records":[{"revision":"4c0b6a0b74f04db79c2d7e401780ee54","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-114049","aliases":[],"title":"vLLM before 0.31.0 Stale allowed_token_ids Mask via InputBatch.condense","description":"vLLM before 0.31.0 contains a cross-request mask leak in InputBatch.condense() that allows remote attackers to constrain other clients' outputs by leaving stale allowed_token_ids rows. Attackers can submit concurrent constrained generate requests, including via unauthenticated /invocations, so recycled batch slots apply their token allowlist to victims' unrestricted requests.","state":0,"publishedAt":"2026-10-21T00:36:26.938+00:00","modifiedAt":"2026-10-21T00:36:26.938+00:00","affected":[{"ecosystem":"Vendor product","name":"vllm","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"vllm-project\",\n                    \"product\": \"vllm\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/vllm\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.31.0\"\n                        },\n                        {\n                            \"version\": \"0.31.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-6cxc-2vcg-w5qc","https://www.vulncheck.com/advisories/vllm-before-0.31.0-stale-allowed-token-ids-mask-via-inputbatch-condense"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114049","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114049","identifiers":["CVE-2026-114049"]},"retained":false,"historicalAffected":[]}],"coverage":[]}