CVE-2026-68561 Wekan: a low-privilege board member escalates to board admin and takes over a private board via the `sort` collection-allow rule

Wekan is open source kanban built with Meteor. Prior to 9.89, the second Boards.allow update rule in server/permissions/boards.js called canUpdateBoardSort in server/lib/utils.js, which authorized any board member whenever fieldNames included sort. Because Meteor combines allow rules with OR...