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CVE-2026-35594

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/10/2026

Last Modified4/10/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-613

References

https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479(security-advisories@github.com)

https://github.com/go-vikunja/vikunja/pull/2581(security-advisories@github.com)

https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0(security-advisories@github.com)

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84(security-advisories@github.com)

IOC Correlations

No correlations recorded

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