CVE-2026-42051

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/getkirby/kirby/releases/tag/4.9.0
X_Refsource_Misc x_refsource_misc
https://github.com/getkirby/kirby/releases/tag/5.4.0

Scores

CVSS v3 4.3
EPSS 0.0019
EPSS Percentile 9.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (4)
getkirby/cms 0 - 4.9.0Packagist
getkirby/cms 5.0.0 - 5.4.0Packagist
getkirby/kirby < 4.9.0 (2 CPE variants)
getkirby/kirby >= 5.0.0, < 5.4.0
Published May 09, 2026
Tracked Since May 09, 2026