CVE-2026-40103
MEDIUMVikunja's Scoped API tokens with projects.background permission can delete project backgrounds
Title source: cnaDescription
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.
References (4)
Core 4
Core References
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https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83
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https://github.com/go-vikunja/vikunja/pull/2584
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https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae
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https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
Scores
CVSS v3
4.3
EPSS
0.0022
EPSS Percentile
12.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-836
Status
published
Products (3)
code.vikunja.io/api
0 - 2.3.0Go
go-vikunja/vikunja
< 2.3.0
vikunja/vikunja
< 2.3.0
Published
Apr 10, 2026
Tracked Since
Apr 10, 2026