CVE-2026-63421

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63421", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-16T19:20:28.988Z", "datePublished": "2026-08-21T20:15:16.459Z", "dateUpdated": "2026-08-26T17:39:12.659Z"}, "containers": {"cna": {"title": "Keystone: `graphql.maxTake` bypass with negative `take`", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-480", "lang": "en", "description": "CWE-480: Use of Incorrect Operator", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh"}, {"name": "https://github.com/keystonejs/keystone/pull/9859", "tags": ["x_refsource_MISC"], "url": "https://github.com/keystonejs/keystone/pull/9859"}, {"name": "https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1", "tags": ["x_refsource_MISC"], "url": "https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1"}, {"name": "https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3"}], "affected": [{"vendor": "keystonejs", "product": "keystone", "versions": [{"version": "< 6.5.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-21T20:15:16.459Z"}, "descriptions": [{"lang": "en", "value": "Keystone is a content management system for Node.js. Prior to 6.5.3, the findMany resolver in packages/core/src/lib/core/queries/resolvers.ts compares the signed take argument directly with graphql.maxTake, allowing a remote unauthenticated GraphQL client to provide a negative take value whose magnitude exceeds the configured bound. The bypass also applies to relationship queries and can return more records than the developer intended, potentially exhausting service resources. This issue is fixed in version 6.5.3."}], "source": {"advisory": "GHSA-cqmq-8755-7xvh", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-26T17:39:02.487794Z", "id": "CVE-2026-63421", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-08-26T17:39:12.659Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-63421", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-26T17:39:02.487794Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-26T17:39:08.675Z"}}], "cna": {"title": "Keystone: `graphql.maxTake` bypass with negative `take`", "source": {"advisory": "GHSA-cqmq-8755-7xvh", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "keystonejs", "product": "keystone", "versions": [{"status": "affected", "version": "< 6.5.3"}]}], "references": [{"url": "https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh", "name": "https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/keystonejs/keystone/pull/9859", "name": "https://github.com/keystonejs/keystone/pull/9859", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1", "name": "https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3", "name": "https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Keystone is a content management system for Node.js. Prior to 6.5.3, the findMany resolver in packages/core/src/lib/core/queries/resolvers.ts compares the signed take argument directly with graphql.maxTake, allowing a remote unauthenticated GraphQL client to provide a negative take value whose magnitude exceeds the configured bound. The bypass also applies to relationship queries and can return more records than the developer intended, potentially exhausting service resources. This issue is fixed in version 6.5.3."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20: Improper Input Validation"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-480", "description": "CWE-480: Use of Incorrect Operator"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-21T20:15:16.459Z"}}}, "cveMetadata": {"cveId": "CVE-2026-63421", "state": "PUBLISHED", "dateUpdated": "2026-08-26T17:39:12.659Z", "dateReserved": "2026-07-16T19:20:28.988Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-08-21T20:15:16.459Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "keystone", "vendor": "keystonejs", "versions": [{"status": "affected", "version": "< 6.5.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Keystone is a content management system for Node.js. Prior to 6.5.3, the findMany resolver in packages/core/src/lib/core/queries/resolvers.ts compares the signed take argument directly with graphql.maxTake, allowing a remote unauthenticated GraphQL client to provide a negative take value whose magnitude exceeds the configured bound. The bypass also applies to relationship queries and can return more records than the developer intended, potentially exhausting service resources. This issue is fixed in version 6.5.3."}, {"lang": "es", "value": "Keystone es un sistema de gesti\u00f3n de contenidos para Node.js. Antes de la versi\u00f3n 6.5.3, el resolvedor findMany en packages/core/src/lib/core/queries/resolvers.ts compara el argumento 'take' con signo directamente con graphql.maxTake, permitiendo que un cliente GraphQL remoto no autenticado proporcione un valor 'take' negativo cuya magnitud excede el l\u00edmite configurado. La omisi\u00f3n tambi\u00e9n se aplica a las consultas de relaciones y puede devolver m\u00e1s registros de los que el desarrollador pretend\u00eda, agotando potencialmente los recursos del servicio. Este problema se solucion\u00f3 en la versi\u00f3n 6.5.3."}], "id": "CVE-2026-63421", "lastModified": "2026-10-12T16:10:00.220", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63421", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T17:39:02.487794Z", "version": "2.0.3"}}]}, "published": "2026-08-21T21:17:01.643", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1"}, {"source": "security-advisories@github.com", "url": "https://github.com/keystonejs/keystone/pull/9859"}, {"source": "security-advisories@github.com", "url": "https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-480"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.5.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "keystone", "source": "cna", "vendor": "keystonejs"}, "product": "keystone", "vendor": "keystonejs"}], "created": "2026-08-21T21:45:03.156982+00:00", "updated": "2026-08-21T21:45:03.266959+00:00", "vendors": ["keystonejs", "keystonejs$PRODUCT$keystone"]}