CVE-2026-111918

Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write taskpositions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing defaultprojecti...

CVE-2026-111918

Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write taskpositions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing defaultprojecti...

EUVD-2026-103303

Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write taskpositions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing defaultprojecti...

CVE-2026-111918: Incorrect Authorization

Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write taskpositions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing defaultprojecti...

Vikunja: Saved filter creation with an empty filter string recalculates task positions across all tenants

Summary In Vikunja v2.6.0 the task position recalculation that runs when a saved filter view is created fails open when the requesting user has no accessible projects. Instead of aborting, the search that feeds the recalculation loses its project scope entirely and returns every task in the...