{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-93840", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-18T18:16:47.489Z", "datePublished": "2026-09-18T19:06:06.001Z", "dateUpdated": "2026-09-24T14:23:15.056Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-24T14:23:15.056Z" }, "datePublic": "2026-07-19T00:00:00.000Z", "title": "vLLM before 0.29.0 Cross-Request Logits Corruption via allowed_token_ids", "descriptions": [ { "lang": "en", "value": "vLLM before 0.29.0 validates allowed_token_ids against tokenizer length instead of model output logits width in SamplingParams._validate_allowed_token_ids(). Attackers can supply token IDs above the output vocabulary that pass validation, causing LogitBiasState to corrupt GPU logits state and allow concurrent requests to sample tokens outside their allowlists." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Validation of Array Index", "cweId": "CWE-129", "type": "CWE" } ] } ], "affected": [ { "vendor": "vllm-project", "product": "vllm", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/vllm", "versions": [ { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.29.0" }, { "version": "0.29.0", "status": "unaffected", "versionType": "semver" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.29.0" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "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/pull/49080", "tags": [ "patch", "issue-tracking" ] }, { "url": "https://github.com/vllm-project/vllm", "tags": [ "product" ] }, { "url": "https://github.com/vllm-project/vllm/commit/5b0e5b69ac1a3884a6479c9537789c95263cc804", "tags": [ "patch" ] }, { "url": "https://github.com/vllm-project/vllm/blob/v0.28.0/vllm/sampling_params.py#L881-L903", "tags": [ "technical-description" ] }, { "url": "https://github.com/vllm-project/vllm/blob/v0.28.0/vllm/v1/worker/gpu/sample/logit_bias.py#L179-L191", "tags": [ "technical-description" ] }, { "name": "VulnCheck Advisory: vLLM before 0.29.0 Cross-Request Logits Corruption via allowed_token_ids", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/vllm-before-0.29.0-cross-request-logits-corruption-via-allowed-token-ids" } ], "credits": [ { "lang": "en", "value": "Mingkai Yu", "type": "finder" }, { "lang": "en", "value": "Jiapeng Li", "type": "finder" }, { "lang": "en", "value": "Jiajia Liu", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-21T18:29:51.620755Z", "id": "CVE-2026-93840", "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": "2026-09-21T18:30:02.425Z" } } ] } }