Vikunja has cross-tenant IDOR in kanban move-task endpoint via unauthorized body task_id

Summary The kanban endpoint POST /api/v1/projects/project/views/view/buckets/bucket/tasks moves a task into a bucket. The task is identified by taskid in the request body. The endpoint's authorization check TaskBucket.CanUpdate only verifies that the caller may update the project/view/bucket name...

CVE-2026-55066

Vikunja (open-source self-hosted task management) has a cross-tenant IDOR in the kanban move-task endpoint. The task_id field is attacker-controlled via the request body, yet TaskBucket.CanUpdate only authorizes the project/view/bucket from the URL — never the task itself. Because Task.ReadOne pe...

CVE-2026-55066 Vikunja: Cross-tenant IDOR in kanban move-task endpoint via unauthorized body task_id

Vikunja is an open-source self-hosted task management platform. Prior to 2.4.0, POST /api/v1/projects/project/views/view/buckets/bucket/tasks accepts a body supplied taskid but TaskBucket.CanUpdate in pkg/models/kanbantaskbucket.go authorizes only the project, view, and bucket from the URL...