GO-2026-6306 Vikunja has an incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parent_project_id=0 in code.vikunja.io/api

Vikunja has an incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parentprojectid=0 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...

CVE-2026-55064

Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but not Admin permission on a shared child project can detach it from its parent hierarchy by submitting parentprojectid equal to 0 to POST /api/v1/projects/project. The Project.CanUpdate...

Vikunja has an incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parent_project_id=0

Summary The fix for CVE-2026-35595 project re-parenting privilege escalation only gates reparent operations when parentprojectid 0. A user with Write but not Admin permission on a shared child project can detach it from its parent by sending parentprojectid: 0, bypassing the Admin requirement. Th...

GHSA-44V6-7FXQ-VGF4 Vikunja has an incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parent_project_id=0

Summary The fix for CVE-2026-35595 project re-parenting privilege escalation only gates reparent operations when parentprojectid 0. A user with Write but not Admin permission on a shared child project can detach it from its parent by sending parentprojectid: 0, bypassing the Admin requirement. Th...

CVE-2026-55064 Vikunja incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parent_project_id=0

Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but not Admin permission on a shared child project can detach it from its parent hierarchy by submitting parentprojectid equal to 0 to POST /api/v1/projects/project. The Project.CanUpdate...

CVE-2026-55064

Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but not Admin permission on a shared child project can detach it from its parent hierarchy by submitting parentprojectid equal to 0 to POST /api/v1/projects/project. The Project.CanUpdate...

CVE-2026-55064 Vikunja incomplete fix for CVE-2026-35595: Write-only user can detach shared project from parent hierarchy via parent_project_id=0

Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but not Admin permission on a shared child project can detach it from its parent hierarchy by submitting parentprojectid equal to 0 to POST /api/v1/projects/project. The Project.CanUpdate...

CVE-2026-55064: Missing Authorization

Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but not Admin permission on a shared child project can detach it from its parent hierarchy by submitting parentprojectid equal to 0 to POST /api/v1/projects/project. The Project.CanUpdate...

CVE-2026-35595: Improper Privilege Management

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CanUpdate check at pkg/models/projectpermissions.go:139-148 only requires CanWrite on the new parent project when changing parentprojectid. However, Vikunja's permission model uses a recursive CTE that walks up th...