How severe is CVE-2026-33326?

CVE-2026-33326 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-33326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33326?

CVE-2026-33326 affects Keystonejs Keystone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33326?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33326 have an EU (EUVD) identifier?

Yes. CVE-2026-33326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20097.

When was CVE-2026-33326 published?

CVE-2026-33326 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33326

CVE-2026-33326 is a medium-severity vulnerability in Keystonejs Keystone with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20097
Weakness: CWE-863
Affected product: Keystonejs Keystone
Published: 2026-03-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-33326?: CVE-2026-33326 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-33326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33326?: CVE-2026-33326 affects Keystonejs Keystone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33326?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33326 have an EU (EUVD) identifier?: Yes. CVE-2026-33326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20097.
When was CVE-2026-33326 published?: CVE-2026-33326 was published on 2026-03-24 and last updated on 2026-06-17.

References

https://github.com/keystonejs/keystone/security/advisories/GHSA-cgcg-q9jh-5pr2

Affected products (1)

cpe:2.3:a:keystonejs:keystone:*:*:*:*:*:node.js:*:*

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