CVE-2026-105633 Plane: Issue Attachment Ownership Hijacking via Missing `issue_id` Scope

Plane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issueid in the URL but omits it from the database query. A project member can use an issueid they control in the URL while targeting another user's attachment by its pk UUID. Because th...