Feed/CVE-2026-63421
CVE-2026-63421HIGHCVSS 7.5

Keystone vulnerable to `graphql.maxTake` bypass with negative `take`

Published Aug 21, 2026·Updated Aug 21, 2026

NVD Description

# Summary The value of `graphql.maxTake` can be bypassed by providing a negative input. This can be used to exceed the developer's intended `graphql.maxTake` value, allowing queries to return results in excess of the `graphql.maxTake` value set. # Impact This affects any project relying on `graphql.maxTake` to bound the number of items returned per query. # Patches This issue has been patched in `@keystone-6/core` version `6.5.3`. If you cannot patch, you can workaround this by restricting `take` input values in your GraphQL queries to the bounded value, or by blocking negative values. # Credit This issue was found by [Haxset's](https://haxset.com) Security Scanner and validated by their team.

Affected Packages (1)

@keystone-6/coreNPM
Fixed in = 6.5.2

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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