Home/CVE/Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication (Get
CVE

CVE-2026-35594

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication (Get

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.

MEDIUM · CVSS 6.5 EPSS 0.00133
Schedule remediation
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-613Insufficient Session Expiration
▤

Affected Products & Versions

1
vikunja< 2.3.0
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go code.vikunja.io/api MODERATE fixed in 2.3.0
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-96q5-xm3p-7m84github.com
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Apr 2026 · 04:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479Patch
https://github.com/go-vikunja/vikunja/pull/2581Issue Tracking
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0Release Notes
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