CVE-2026-105633
Plane is an open-source project management tool.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Plane Is An Open-Source Project Management Tool. | before 1.4.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.