PT-2026-60249 · Kanboard · Kanboard

George Chen · Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-58660

Mitre

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Kanboard through 1.2.52, 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.

Exploit

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-58660

Affected Products

Kanboard

References · 5

• 🔥 https://github.com/kanboard/kanboard/issues/5852 · Exploit
• https://github.com/kanboard/kanboard/commit/564cc30e1e360959572e01e158734d9475c05903 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-58660 · Security Note
• https://github.com/kanboard/kanboard/pull/5853 · Note
• https://vulncheck.com/advisories/kanboard-boardajaxcontroller-missing-ownership-check-via-drag-and-drop · Note