CVE-2026-44176— Kirby: `pages.access` permission is not checked during rendering of page drafts

Kirby: `pages.access` permission is not checked during rendering of page drafts

Kirby is an open-source content management system. Versions prior to 4.9.1 and 5.4.1 do not check the `pages.access` permission during page draft rendering. Permissions are defined for each user 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 preview token or is authenticated by a valid user. In affected releases, Kirby allowed page drafts to be rendered if any valid user was authenticated, even if that user did not have access to the specific page model. Authenticated attackers with knowledge of the full path to an existing page draft could then access the rendered frontend page. This could lead to the disclosure of sensitive information, e.g. ahead of the launch of a new product or post. This issue has been fixed in versions 4.9.1 and 5.4.1.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

授权机制缺失

Kirby 授权问题漏洞

Kirby Kirby是Kirby个人开发者的一款服务器与网络设备产品。 Kirby 4.9.1之前版本和5.0.0至5.4.1之前版本存在授权问题漏洞，该漏洞源于页面草稿渲染期间未检查pages.access权限，可能导致已认证的攻击者在了解页面草稿路径时访问渲染后的前端页面，从而导致敏感信息泄露。

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