CVE-2026-63421Keystone: `graphql.maxTake` bypass with negative `take`
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-20, CWE-480
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
keystonejs keystone keystonejs:keystone (from the name) | before 6.5.3 | CNA record |
References
- https://github.com/keystonejs/keystone/security/advisories/GHSA-cqmq-8755-7xvhx-refsource-confirm
- https://github.com/keystonejs/keystone/pull/9859x-refsource-misc
- https://github.com/keystonejs/keystone/commit/9fb88b246950ce4de754a43fe6416f20403577b1x-refsource-misc
- https://github.com/keystonejs/keystone/releases/tag/@keystone-6/core@6.5.3x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.