CVE-2026-42051 MEDIUM

CVE-2026-42051: Kirby: System API endpoint leaks license data and installed version to authenticated users

Vendor Getkirby
Product kirby
Weakness CWE-862 · Missing authorization
Published May 9, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 9, 2026 CVE published
May 11, 2026 Record updated