CVE-2026-40103
Medium
Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.
SeverityMedium
CVSS4.3
Exploit probability—
ProductVikunja
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-836CWE-836
How to fix
Update
- vikunja vikunja2.3.0 or later
- code.vikunja.io/api2.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vikunja vikunja | v < 2.3.0 | 2.3.0 |
| code.vikunja.io/apiGo | v < 2.3.0, No range specified | 2.3.0 |
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