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Vulnerability record · CVE-2026-55065 · published 28 August 2026

CVE-2026-55065: Improper authorization vulnerability

Vikunja is an open-source self-hosted task management platform. From 0.24.6 until 2.4.0, DELETE /api/v1/projects/:project/views/:view permits an authenticated user to supply a view identifier from another project while authorizing only against an attacker-controlled project identifier. ProjectView.CanDelete in pkg/models/project_view_permissions.go does not establish that the view belongs to the path project, and ProjectView.Delete in pkg/models/project_view.go continues after the scoped project_views delete affects no rows. Its subsequent deletes select task_buckets and task_positions only by project_view_id, allowing cross-tenant destruction of Kanban assignments and ordering while leaving the victim view and tasks intact. This issue is fixed in version 2.4.0.

8.1 CVSS 3.1 High EPSS 0.50% · top 59.3% CWE-285 · Improper authorizationCWE-639 · Insecure direct object reference Deferred
8.1CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

Description

Vikunja is an open-source self-hosted task management platform. From 0.24.6 until 2.4.0, DELETE /api/v1/projects/:project/views/:view permits an authenticated user to supply a view identifier from another project while authorizing only against an attacker-controlled project identifier. ProjectView.CanDelete in pkg/models/project_view_permissions.go does not establish that the view belongs to the path project, and ProjectView.Delete in pkg/models/project_view.go continues after the scoped project_views delete affects no rows. Its subsequent deletes select task_buckets and task_positions only by project_view_id, allowing cross-tenant destruction of Kanban assignments and ordering while leaving the victim view and tasks intact. This issue is fixed in version 2.4.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References

LinkTags
https://github.com/go-vikunja/vikunja/commit/6895a7765ef1667be4b79df29549d33b9e1ca9ca
https://github.com/go-vikunja/vikunja/pull/3239
https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-gg93-x632-9ccv
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-gg93-x632-9ccv

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Source: NIST National Vulnerability Database (record CVE-2026-55065), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.