Description

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.

INFO

Published Date :

2026-01-08T18:09:10.362Z

Last Modified :

2026-01-08T18:20:29.904Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21896 vulnerability.

Vendors Products
Getkirby
  • Kirby
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21896.

URL Resource
https://github.com/getkirby/kirby/commit/f5ce1347b427b819bf193acf11fd0da232f7af47 cve-icon cve-icon
https://github.com/getkirby/kirby/releases/tag/5.2.2 cve-icon cve-icon
https://github.com/getkirby/kirby/security/advisories/GHSA-4j78-4xrm-cr2f cve-icon cve-icon
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CVSS Vulnerability Scoring System

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Privileges Required
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SS Availability