CVE-2026-42137: CWE-862: Missing Authorization in getkirby kirby
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.
AI Analysis
Technical Summary
CVE-2026-42137 is a missing authorization vulnerability (CWE-862) in the Kirby content management system. Specifically, the 'pages.access/list' and 'files.access/list' permissions were not consistently checked in the Panel and REST API prior to versions 4.9.0 and 5.4.0. This inconsistency could allow unauthorized access to certain content listings. The issue has been patched in Kirby versions 4.9.0 and 5.4.0. The CVSS 4.0 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality.
Potential Impact
The vulnerability allows unauthorized users to list pages and files in the Kirby CMS Panel and REST API, potentially exposing sensitive content or metadata. This could lead to information disclosure within affected installations. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade Kirby CMS to version 4.9.0 or later if using the 4.x branch, or to version 5.4.0 or later if using the 5.x branch. These versions contain the official fix for the missing authorization checks. Patch status is confirmed by the vendor advisory stating the issue is fixed in these versions.
CVE-2026-42137: CWE-862: Missing Authorization in getkirby kirby
Description
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.
CVSS v4.0
Score 7.1high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42137 is a missing authorization vulnerability (CWE-862) in the Kirby content management system. Specifically, the 'pages.access/list' and 'files.access/list' permissions were not consistently checked in the Panel and REST API prior to versions 4.9.0 and 5.4.0. This inconsistency could allow unauthorized access to certain content listings. The issue has been patched in Kirby versions 4.9.0 and 5.4.0. The CVSS 4.0 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality.
Potential Impact
The vulnerability allows unauthorized users to list pages and files in the Kirby CMS Panel and REST API, potentially exposing sensitive content or metadata. This could lead to information disclosure within affected installations. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade Kirby CMS to version 4.9.0 or later if using the 4.x branch, or to version 5.4.0 or later if using the 5.x branch. These versions contain the official fix for the missing authorization checks. Patch status is confirmed by the vendor advisory stating the issue is fixed in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-24T17:15:21.833Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ffe1afcbff5d8610eac9f8
Added to database: 05/10/2026, 01:38:55 UTC
Last enriched: 05/17/2026, 10:08:19 UTC
Last updated: 07/02/2026, 08:51:19 UTC
Views: 75
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