Auth bypass in Getkirby Kirby
CVE-2026-40099
Kirby is an open-source content management system. Kirby's user permissions control which user role is allowed to perform specific actions to content models in the CMS. These permissions are defined for each role in the user blueprint (`si…
Vulnerability class: Broken Access Control
EPSS: 0.003 (19.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Getkirby Kirby — versions < 4.9.0, >= 5.0.0, < 5.4.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-40099?
- CVE-2026-40099 is a medium-severity vulnerability in Getkirby Kirby, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-04-24.
- How severe is CVE-2026-40099?
- Medium severity. CVSS v3 base score is 6.5 out of 10.