CVE-2026-59240

The vulnerability involves an Insecure Direct Object Reference (IDOR) in the DeleteNotificationController::delete() method at endpoint GET /notification/delete/{id}. The flaw allows any authenticated user, regardless of company or permissions, to delete notifications belonging to any other user in the system. The controller retrieves the target record with Notification::findOrFail($id) and deletes it without validating user_id or company_id ownership, unlike the sibling SetNotificationReadAjaxController, which correctly scopes lookups by Auth::id(). Because notification identifiers are sequential, an attacker can iterate over IDs to systematically delete notifications belonging to any user, denying them visibility of ticket alerts, task assignments, and other system events.