CVE-2026-40103
Vikunja's Scoped API tokens with projects.background permission can delete project backgrounds
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
7th
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.
| CWE | CWE-836 |
| Vendor | go-vikunja |
| Product | vikunja |
| Published | Apr 10, 2026 |
| Last Updated | Apr 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
go-vikunja / vikunja
< 2.3.0
References
github.com: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83 github.com: https://github.com/go-vikunja/vikunja/pull/2584 github.com: https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae github.com: https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0