CVE-2026-35594 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-10 | Updated 2026-04-14 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-613: Insufficient Session Expiration

Product status

< 2.3.0

affected

References

github.com/...ikunja/security/advisories/GHSA-96q5-xm3p-7m84 exploit

github.com/...ikunja/security/advisories/GHSA-96q5-xm3p-7m84

github.com/go-vikunja/vikunja/pull/2581

github.com/...ommit/379d8a5c19334ffe4846003f590e202c31a75479

github.com/go-vikunja/vikunja/releases/tag/v2.3.0

cve.org (CVE-2026-35594)

nvd.nist.gov (CVE-2026-35594)

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