CVE-2026-42051

Kirby: System API endpoint leaks license data and installed version to authenticated users

State: Published
Severity: 5.3 Medium
Published: May 9, 2026
Updated: May 11, 2026
Reserved: Apr 23, 2026

Description

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
kirbygetkirby	< 4.9.0Affected >= 5.0.0, < 5.4.0Affected

References

https://github.com/getkirby/kirby/security/advisories/GHSA-x68m-c7jf-2572
https://github.com/getkirby/kirby/releases/tag/4.9.0
https://github.com/getkirby/kirby/releases/tag/5.4.0

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