CVE-2026-91984
Vikunja before 2.6.0 Broken Object-Level Authorization via task-position
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 15, 2026
- Updated
- Sep 17, 2026
- Reserved
- Sep 15, 2026
Description
Vikunja before 2.6.0 fails to validate that user-supplied project_view_id in task-position requests belongs to the task's project. Authenticated attackers can insert task position rows into arbitrary other tenant project views via POST or PUT task-position endpoints.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
vikunjago-vikunja |
|
References
- GitHub Security Advisory (GHSA-w39f-h553-h2mx)vendor-advisory
- VulnCheck Advisory: Vikunja before 2.6.0 Broken Object-Level Authorization via task-positionthird-party-advisory
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