Medium 5.7Published Jan 8, 2026

CVE-2026-21896Kirby is an open-source content management system.

Updated under an hour ago (2026-10-19 10:00 UTC)

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It affects getkirby kirby. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for getkirby kirby

Exploited in the last 30 days

Kirby is an open-source content management system. From versions 5.0.0 to 5.2.1, Kirby is missing permission checks in the content changes API. This vulnerability affects all Kirby sites where user permissions are configured to prevent specific role(s) from performing write actions, specifically by disabling the update permission with the intent to prevent modifications to site content. This vulnerability does not affect those who have not altered the deviated from default user permissions. This issue has been patched in version 5.2.2.

CVSS: 5.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

getkirby kirby getkirby:kirby	from 5.0.0 before 5.2.2	NVD

References

https://github.com/getkirby/kirby/commit/f5ce1347b427b819bf193acf11fd0da232f7af47patch
https://github.com/getkirby/kirby/releases/tag/5.2.2product, release-notes
https://github.com/getkirby/kirby/security/advisories/GHSA-4j78-4xrm-cr2fpatch, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.