What is CVE-2026-29905?

CVE-2026-29905 is a medium-severity vulnerability in Getkirby Kirby, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-03-26.

How severe is CVE-2026-29905?

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

Improper input validation in Getkirby Kirby

CVE-2026-29905

Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (36.5th 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:N/A:H.

Affected products

Getkirby Kirby
N/a — versions n/a

Weakness classification (CWE)

References

cve@mitre.org (Product)
cve@mitre.org (Exploit)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-29905?: CVE-2026-29905 is a medium-severity vulnerability in Getkirby Kirby, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-03-26.
How severe is CVE-2026-29905?: Medium severity. CVSS v3 base score is 6.5 out of 10.