Use of Incorrect Operator Affecting @keystone-6/core package, versions <6.5.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2026
- disclosed21 Aug 2026
- creditUnknown
Introduced: 21 Aug 2026
CVE-2026-63421 (opens in a new tab)How to fix?
Upgrade @keystone-6/core to version 6.5.3 or higher.
Overview
Affected versions of this package are vulnerable to Use of Incorrect Operator via the take parameter in GraphQL queries. An attacker can cause excessive resource consumption by supplying negative values to bypass intended query limits.
Workaround
This vulnerability can be mitigated by restricting take input values in GraphQL queries to the bounded value or by blocking negative values.