Vikunja's Scoped API tokens with projects.background permission can delete project backgrounds

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-40103
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-10 17:17:13 UTC
Updated2026-04-10 17:17:13 UTC
DescriptionVikunja 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-836 | CWE-836 CWE-836: Use of Password Hash Instead of Password for Authentication

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go-vikunja Vikunja affected < 2.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/go-vikunja/vikunja/releases/tag/v2.3.0 [email protected] github.com
github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83 [email protected] github.com
github.com/go-vikunja/vikunja/pull/2584 [email protected] github.com
github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9... [email protected] github.com
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