CVE-2026-45334 Kirby: Content locks disclose IDs and emails of inaccessible users from `users.access/list` permissions

Kirby is an open-source content management system. In versions prior to 4.9.1 and 5.4.1, the content-locking feature returned lock information without checking the requesting user's access permissions. Kirby's Panel includes a content-locking feature that records which user currently has a model...

CVE-2026-45334

Kirby CMS (versions < 4.9.1 and

GHSA-39VQ-49QM-R2MC Kirby CMS's content locks disclose IDs and emails of inaccessible users from `users.access/list` permissions

TL;DR This vulnerability affects all Kirby sites that restrict the visibility of users for certain roles via the users.access or users.list permissions. A site is affected if users of a particular role are not allowed to see other users in the Panel, for example because the role's blueprint sets...

Kirby CMS's content locks disclose IDs and emails of inaccessible users from `users.access/list` permissions

TL;DR This vulnerability affects all Kirby sites that restrict the visibility of users for certain roles via the users.access or users.list permissions. A site is affected if users of a particular role are not allowed to see other users in the Panel, for example because the role's blueprint sets...