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CVE-2026-40103
Vikunja's Scoped API tokens with projects.background permission can delete project backgrounds
Medium4.3EPSS 0.22%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
- affected < 2.3.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gocode.vikunja.io/apiGHSA-v479-vf79-mg83 (opens in a new tab)
References (4)
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/go-vikunja/vikunja/pull/2584 (opens in a new tab)x_refsource_MISC
- https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae (opens in a new tab)x_refsource_MISC
- https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-v479-vf79-mg83 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2026-40103)Record last updated .