CVE-2026-29905

| EUVD-2026-16232 MEDIUM
2026-03-26 mitre GHSA-cw7v-45wm-mcf2
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 26, 2026 - 16:45 vuln.today
EUVD ID Assigned
Mar 26, 2026 - 16:45 euvd
EUVD-2026-16232
CVE Published
Mar 26, 2026 - 00:00 nvd
MEDIUM 6.5

Tags

PHP Denial Of Service

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.

Analysis

Kirby CMS versions through 5.1.4 allow authenticated editors to trigger a persistent denial of service by uploading malformed images that bypass getimagesize() validation, causing fatal TypeErrors during metadata or thumbnail processing. A proof-of-concept exists and the vulnerability is automatable post-authentication, though no CISA KEV confirmation is evident. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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CVE-2026-29905 vulnerability details – vuln.today
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