CVE-2026-63421
Published:August 21, 2026
Updated:September 24, 2026
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.
Affected Packages
https://github.com/keystonejs/keystone.git (GITHUB):
Affected version(s) >=@keystone-6/core@6.5.0 <@keystone-6/core@6.5.3Fix Suggestion:
Update to version @keystone-6/core@6.5.3@keystone-6/core (NPM):
Affected version(s) >=1.0.0 <6.5.3Fix Suggestion:
Update to version 6.5.3@keystone-6/core (NPM):
Affected version(s) >=0.0.0-rc-20221013033655 <6.5.3Fix Suggestion:
Update to version 6.5.3Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
EPSS
Base Score:
0.47