CVE-2026-54766
Description
Vikunja is an open-source self-hosted task management platform. From 0.21.0 until 2.4.0, the project duplication operation in pkg/models/project_duplicate.go allows an authenticated user who can read a source project to place its duplicate beneath an arbitrary target parent project. ProjectDuplicate.CanCreate calls parent.CanCreate on an unhydrated Project containing only the body supplied parent_project_id instead of calling parent.CanWrite, so the target parent write-permission check is skipped. The ordinary project creation path enforces that permission, but PUT /api/v1/projects/{project}/duplicate does not, allowing attacker-owned content to be injected into another user or team project hierarchy. This issue is fixed in version 2.4.0.
How to fix
- code.vikunja.io/api2.4.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| code.vikunja.io/apiGo | 0.21.0 ≤ v < 2.4.0, 0.21.0 ≤ v | 2.4.0 |
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