{"schemaVersion":3,"id":"CVE-2026-63421","aliases":["GHSA-cqmq-8755-7xvh"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-08-21T20:15:16.459Z","modified":"2026-08-26T17:39:12.659Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0067,"percentile":0.51073,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.20100000000000004,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00469},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0067,"percentile":0.51073}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00469,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0067,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0067,"percentile":0.51073}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"},{"id":"CWE-480","name":"Use of Incorrect Operator","description":"The product accidentally uses the wrong operator, which changes the logic in security-relevant ways.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Low","url":"https://cwe.mitre.org/data/definitions/480.html"}],"affected":[{"vendor":"keystonejs","product":"keystone","name":"keystone","label":"keystone","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 6.5.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.5.3","eol":null,"hubHref":"/vendor/keystonejs/keystone"},{"vendor":"@keystone-6","product":"core","name":"@keystone-6/core","label":"core","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/@keystone-6/core","purlType":"npm","versions":[{"text":"< 6.5.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.5.3","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh","label":"github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh","hostname":"github.com","tags":["X Refsource CONFIRM","WEB"]},{"url":"https://github.com/keystonejs/keystone/pull/9859","label":"github.com/keystonejs/keystone/pull/9859","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1","label":"github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3","label":"github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/keystonejs/keystone","label":"github.com/keystonejs/keystone","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-21T20:15:16.459Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-26T17:39:12.659Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T10:41:09.015Z","stale":false,"partial":false}}