What is CVE-2026-42137?

CVE-2026-42137 is a medium-severity vulnerability in Getkirby Kirby, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-05-09.

How severe is CVE-2026-42137?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Getkirby Kirby

CVE-2026-42137

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4…

Vulnerability class: Broken Access Control

EPSS: 0.000 (1.1th 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:H/I:N/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_MISC, Release Notes)
security-advisories@github.com (x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42137?: CVE-2026-42137 is a medium-severity vulnerability in Getkirby Kirby, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-05-09.
How severe is CVE-2026-42137?: Medium severity. CVSS v3 base score is 6.5 out of 10.