CVE-2026-35594
Vikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
11th
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication (GetLinkShareFromClaims in pkg/models/link_sharing.go) constructs authorization objects entirely from JWT claims without any server-side database validation. When a project owner deletes a link share or downgrades its permissions, all previously issued JWTs continue to grant the original permission level for up to 72 hours (the default service.jwtttl). This vulnerability is fixed in 2.3.0.
| CWE | CWE-613 |
| Vendor | go-vikunja |
| Product | vikunja |
| Published | Apr 10, 2026 |
| Last Updated | Apr 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
go-vikunja / vikunja
< 2.3.0
References
github.com: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84 github.com: https://github.com/go-vikunja/vikunja/pull/2581 github.com: https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479 github.com: https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0