CVE-2026-55065: CWE-285: Improper Authorization in go-vikunja vikunja
Description
A vulnerability in Vikunja versions from 0.24.6 up to but not including 2.4.0 allows an authenticated user to delete Kanban assignments and ordering across projects due to improper authorization checks in the DELETE /api/v1/projects/:project/views/:view endpoint. The flaw arises because the authorization logic does not verify that the view belongs to the specified project, enabling cross-tenant destructive actions on task buckets and positions. This issue is fixed in version 2.4.0.
CVSS v3.1
Score 8.1high
Affected software
go-vikunja
vikunja
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Vikunja, an open-source task management platform, contains an improper authorization vulnerability (CWE-285) in versions 0.24.6 through 2.3.x. The DELETE endpoint for project views permits an authenticated user to specify a view ID from a different project than the one authorized, due to ProjectView.CanDelete not confirming view ownership and ProjectView.Delete continuing deletion operations scoped only by project_view_id. This allows cross-tenant deletion of Kanban assignments and ordering without affecting the victim's views or tasks themselves. The vulnerability is resolved in version 2.4.0.
Potential Impact
An authenticated user with at least limited privileges can delete Kanban board assignments and ordering in projects they do not own, leading to integrity loss of task organization across tenants. The vulnerability does not disclose data or delete tasks themselves but causes destructive changes to task bucket and position assignments, impacting availability and integrity of project views.
Mitigation Recommendations
Upgrade Vikunja to version 2.4.0 or later where this authorization flaw is fixed. Patch status is confirmed by the vendor advisory stating the issue is resolved in 2.4.0. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T14:33:35.710Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a91e40cacd9273b4942e81f
Added to database: 08/28/2026, 19:39:56 UTC
Last enriched: 09/07/2026, 15:14:13 UTC
Last updated: 10/11/2026, 06:48:17 UTC
Views: 34
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