CVE-2026-35594CWE-613

Vikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade

Medium · published April 10, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
37.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00442 · 37.3th percentile
Weakness
CWE-613 · Insufficient Session Expiration
Published
2026-04-10T15:55Z
EPSS history
Timeline
  • 10 APR 15:55Z
    Vikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade
    cvelistv5