CVE-2026-58660 Kanboard BoardAjaxController Missing Ownership Check via Drag-and-Drop
Authenticated users can move tasks from private projects they do not belong to by exploiting missing ownership checks in the drag-and-drop endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-58660?
CVE-2026-58660 is a high-severity missing authorization vulnerability in kanboard, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kanboard before 1.2.53, fixed in commit 564cc30, BoardAjaxController save() method (used by the kanban board drag-and-drop endpoint) validates the caller's role on the attacker-supplied project_id but never verifies that the supplied task_id actually belongs to that project. Because task identifiers are sequential integers shared across the entire instance, any authenticated user who is a member of at least one project can enumerate and move (corrupt/hide) tasks belonging to any other project on the same instance, including private projects they have no membership or role on.
Weakness: CWE-639
Which versions are affected by CVE-2026-58660?
How do I fix CVE-2026-58660?
No fix has been published for CVE-2026-58660 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-58660 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58660 exists.
Sources
Also known as GHSA-f95x-r3pv-jh63.