medium4.3
CVE-2026-40103
Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | < 2.3.0 | 2.3.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vikunja | Vikunja | before 2.3.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae
- https://github.com/go-vikunja/vikunja/pull/2584
- https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83
- https://github.com/advisories/GHSA-v479-vf79-mg83
- https://nvd.nist.gov/vuln/detail/CVE-2026-40103