CVE-2026-63421 — Keystone: `graphql.maxTake` bypass with negative `take`
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 d…
Published: 2026-08-21 · CVSS: 7.5 · CVSS 3.1
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: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7