CVE-2026-29905

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/26/2026

Last Modified4/2/2026

Sourcenvd

Honeypot Sightings0

Affected Products

getkirby:kirby

Weaknesses (CWE)

CWE-20CWE-252

References

https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing(cve@mitre.org)

https://github.com/Stalin-143/CVE-2026-29905(cve@mitre.org)

https://github.com/getkirby/kirby/releases/tag/5.2.0-rc.1(cve@mitre.org)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.