{"cve":"CVE-2026-63421","nvd":{"published":"2026-08-21T21:17:01.643","modified":"2026-10-12T16:10:00.220","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-20","CWE-480"],"references":["https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1","https://github.com/keystonejs/keystone/pull/9859","https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3","https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvh"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-63421","score":0.0067,"percentile":0.51691,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-cqmq-8755-7xvh","url":"https://osv.dev/vulnerability/GHSA-cqmq-8755-7xvh","summary":"Keystone vulnerable to `graphql.maxTake` bypass with negative `take`","modified":"2026-08-21T21:10:59.624585Z","packages":[{"ecosystem":"npm","name":"@keystone-6/core","purl":"pkg:npm/%40keystone-6/core","ranges":["<6.5.3"],"fixed":["6.5.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}