CVE-2026-44176: Kirby CMS's `pages.access` permission is not checked during rendering of page drafts ### TL;DR This vulnerability affects all Kirby sites where users of a…

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Kirby CMS's `pages.access` permission is not checked during rendering of page drafts

### TL;DR

This vulnerability affects all Kirby sites where users of a particular role have no permission to access pages (`pages.access` permission is disabled). This can be due to configuration in the user blueprint(s), via `options` in the model blueprint(s) or via a combination of both settings.

Kirby sites are *not* affected if they intend all users of the site to be able to access all page drafts of the site. The vulnerability can only be exploited by authenticated users. Write actions are *not* affected by this vulnerability.

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### Introduction

Missing authorization allows authenticated users to perform actions they are not intended to have access to.

The effects of missing authorization can include unauthorized access to sensitive information as well as unauthorized changes to content or system information.

### Affected components

Kirby's user permissions control which user role is allowed to perform specific actions to content models in the CMS. These permissions are defined for each role in the user blueprint (`site/blueprints/users/...`). It is also possible to customize the permissions for each target model in the model blueprints (such as in `site/blueprints/pages/...`) using the `options` feature. The permissions and options together control the authorization of user actions.

Kirby provides the `pages.access` and `pages.list` permissions (among others). The `list` permission controls whether affected models appear in lists throughout the Panel and REST API. The `access` permission has the same effect but also disables direct access to the affected models.

This vulnerability affects the path resolver for the main CMS router. The resolver takes an input path from the requested URL and determines which model (page or file) should be rendered. When a path is requested that points to a page draft, the resolver checks that the request either contains a valid pre

Affected

2 ranges

Vendor	Product	Version range	Fixed in
getkirby	cms	>= 0 < 4.9.1	4.9.1
getkirby	cms	>= 5.0.0 < 5.4.1	5.4.1

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