CVE-2026-29905

State: Published
Severity: 6.5 Medium
Published: Mar 26, 2026
Updated: Mar 26, 2026
Reserved: Mar 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-252 Unchecked Return Value
CWE-20 Improper Input Validation

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/getkirby/kirby/releases/tag/5.2.0-rc.1
https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing
https://github.com/Stalin-143/CVE-2026-29905

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