CVE-2026-35594
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.
- CVSS 3.1
- 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-26)
- CWE
- CWE-613
- Published
- Modified
- Record from
- the NVD, synced
Affected
- vikunja:vikunja
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-96q5-xm3p-7m84 | Go | code.vikunja.io/api | <2.3.0 | 2.3.0 |
| GO-2026-5276 | Go | code.vikunja.io/api | all versions | no fix published |
References
- https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479
- https://github.com/go-vikunja/vikunja/pull/2581
- https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84