Medium 4.3Published Apr 10, 2026

CVE-2026-40103Vikunja's Scoped API tokens with projects.background permission can delete project backgrounds

Updated under an hour ago (Oct 26, 2026, 8:50 PM ET)

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Every CVE for go-vikunja vikunja

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-836
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

go-vikunja vikunja go_vikunja:vikunja (from the name)	before 2.3.0	CNA record
vikunja vikunja vikunja:vikunja	before 2.3.0	NVD

References

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83	x-refsource-confirm, exploit, vendor-advisory
https://github.com/go-vikunja/vikunja/pull/2584	x-refsource-misc, issue-tracking
https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae	x-refsource-misc, patch
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.