CVE-2026-35594
MEDIUMVikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84
X_Refsource_Misc x_refsource_misc
https://github.com/go-vikunja/vikunja/pull/2581
X_Refsource_Misc x_refsource_misc
https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479
X_Refsource_Misc x_refsource_misc
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
Scores
CVSS v3
6.5
EPSS
0.0027
EPSS Percentile
18.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-613
Status
published
Products (2)
code.vikunja.io/api
0 - 2.3.0Go
go-vikunja/vikunja
< 2.3.0
Published
Apr 10, 2026
Tracked Since
Apr 10, 2026