CVE-2026-68581

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID interface, a link-share JWT whose numeric ID equals a target user's ID is...

CVE-2026-68582

Vikunja versions = 0.24.0 and = 2.3.0 contain a broken object level authorization BOLA vulnerability in the task-collection endpoint GET /api/v1/projects/project/views/view/tasks. The endpoint loads the requested project view from the URL path without verifying the caller is authorized for it. Fo...

CVE-2026-68582

Vikunja up to 2.3.0 contains a broken object level authorization (BOLA) in the task-collection endpoint GET /api/v1/projects/{project}/views/{view}/tasks. The endpoint loads the requested project view from the URL path without validating the caller’s authorization, allowing a link-share token hol...

CVE-2026-68582 Vikunja 0.24.0 Broken Object Level Authorization via Link-Share Token

Vikunja versions = 0.24.0 and = 2.3.0 contain a broken object level authorization BOLA vulnerability in the task-collection endpoint GET /api/v1/projects/project/views/view/tasks. The endpoint loads the requested project view from the URL path without verifying the caller is authorized for it. Fo...

CVE-2026-68581

Vikunja versions 0.22.0–2.3.0 are affected by an authentication bypass in API token management caused by principal-id collision: user IDs and link-share IDs share a numeric space via a generic web.Auth.GetID() interface, enabling a link-share JWT with a numeric ID equal to a target user ID to be ...

CVE-2026-68581 Vikunja 0.22.0 through 2.3.0 Authentication Bypass via Principal ID Collision

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID interface, a link-share JWT whose numeric ID equals a target user's ID is...

EUVD-2026-51991

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID interface, a link-share JWT whose numeric ID equals a target user's ID is...

CVE-2026-56765 Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

CVE-2026-56765 Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

CVE-2026-56765

Summary (CVE-2026-56765): Vikunja prior to 2.2.1 contains two related authorization flaws. First, the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. Second, the GetTaskAttachment endpoint performs permission check...

GO-2026-5650 Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds in code.vikunja.io/api

Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive...

GO-2026-5608 Vikunja has Algorithmic Complexity DoS in Repeating Task Handler in code.vikunja.io/api

Vikunja has Algorithmic Complexity DoS in Repeating Task Handler in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability...

GO-2026-5582 Vikunja has File Size Limit Bypass via Vikunja Import in code.vikunja.io/api

Vikunja has File Size Limit Bypass via Vikunja Import in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability scanners, please...

GO-2026-5428 Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug in code.vikunja.io/api

Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

GO-2026-5362 Vikunja Vulnerable to TOTP Brute-Force Due to Non-Functional Account Lockout in code.vikunja.io/api

Vikunja Vulnerable to TOTP Brute-Force Due to Non-Functional Account Lockout in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

GO-2026-5276 Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade in code.vikunja.io/api

Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing...

GO-2026-5258 Vikunja has TOTP Two-Factor Authentication Bypass via OIDC Login Path in code.vikunja.io/api

Vikunja has TOTP Two-Factor Authentication Bypass via OIDC Login Path in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability...

GO-2026-5114 Vikunja Missing Authorization on CalDAV Task Read in code.vikunja.io/api

Vikunja Missing Authorization on CalDAV Task Read in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability scanners, please...

GO-2026-5111 Vikunja has HTML Injection via Task Titles in Overdue Email Notifications in code.vikunja.io/api

Vikunja has HTML Injection via Task Titles in Overdue Email Notifications in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

CVE-2026-35599

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an On loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far ...