{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-114049","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-20T21:41:06.180Z","datePublished":"2026-10-21T00:36:26.938Z","dateUpdated":"2026-10-28T15:13:24.706Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-21T00:36:26.938Z"},"datePublic":"2026-10-06T00:00:00.000Z","title":"vLLM before 0.31.0 Stale allowed_token_ids Mask via InputBatch.condense","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Expected Behavior Violation","cweId":"CWE-440","type":"CWE"}]}],"affected":[{"vendor":"vllm-project","product":"vllm","defaultStatus":"unaffected","packageURL":"pkg:pypi/vllm","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"0.31.0"},{"version":"0.31.0","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*","versionEndExcluding":"0.31.0"}]}]}],"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:L/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW"}}],"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-6cxc-2vcg-w5qc","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-6cxc-2vcg-w5qc)"},{"name":"VulnCheck Advisory: vLLM before 0.31.0 Stale allowed_token_ids Mask via InputBatch.condense","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vllm-before-0.31.0-stale-allowed-token-ids-mask-via-inputbatch-condense"}],"credits":[{"lang":"en","value":"glaziermag","type":"finder"},{"lang":"en","value":"jperezdealgaba","type":"coordinator"},{"lang":"en","value":"SunnyR","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-28T15:13:07.744180Z","id":"CVE-2026-114049","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-28T15:13:24.706Z"}}]}}