CVE-2026-35594 MEDIUM

CVE-2026-35594: Vikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade

Vendor Go-Vikunja
Product vikunja
Weakness CWE-613 · Insufficient session expiration
Published April 10, 2026
Last update April 14, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 14, 2026 Record updated