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 issue_id in the URL but omits it from the database query. A proje…
Published: 2026-10-05 · CVSS: 7.1 · CVSS 3.1
Plane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issue_id in the URL but omits it from the database query. A project member can use an issue_id they control in the URL while targeting another user's attachment by its pk UUID. Because the server matches only pk, workspace, and project_id, it modifies the attachment regardless of the issue_id in the URL. When the attachment is pending and has not been confirmed as uploaded, the PATCH handler sets created_by = request.user and transfers attachment ownership to the attacker. This issue is fixed in 1.4.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7