#VU121188 Permissions, Privileges, and Access Controls in Kirby - CVE-2026-21896
Published: January 13, 2026
Vulnerability identifier: #VU121188
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-21896
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Kirby
Kirby
Software vendor:
Ian Stewart
Ian Stewart
Description
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to application does not properly impose security restrictions when changing content via API. A remote user without the write permissions can still write content via API calls.
Remediation
Install updates from vendor's website.