Auth bypass in Keystonejs Keystone
CVE-2026-33326
Keystone is a content management system for Node.js. Prior to version 6.5.2, {field}.isFilterable access control can be bypassed in findMany queries by passing a cursor. This can be used to confirm the existence of records by protected field values. The fix for CVE-2025-46720 (field-level isFilterable bypass for update and delete mutations) added checks to the where parameter in update and delete mutations however the cursor parameter in findMany was not patched and accepts the same UniqueWhere input type. This issue has been patched in version 6.5.2.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Keystonejs Keystone — versions < 6.5.2
Weakness classification (CWE)
References
- github.com/keystonejs/keystone/security/advisories/GHSA-cgcg-q9jh-5pr2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33326?
- CVE-2026-33326 is a medium-severity vulnerability in Keystonejs Keystone, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-03-24.
- How severe is CVE-2026-33326?
- Medium severity. CVSS v3 base score is 4.3 out of 10.