Is CVE-2026-29905 actively exploited?

CVE-2026-29905 has no public evidence of in-the-wild exploitation as of 2026-04-02.

What is the CVSS score for CVE-2026-29905?

CVE-2026-29905 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2026-29905?

Patch guidance is available from getkirby security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-29905.

CVE-2026-29905 - remediation guidance & executive summary

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-20 · Improper Input Validation CWE-252

Metadata

Primary Vendor: GETKIRBY
Published: 3/26/2026
Last Modified: 4/2/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-29905

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary