CVE-2026-29056 Kanboard's privilege escalation via mass assignment in user invite registration allows any invited user to become admin
An invited user can escalate privileges to administrator by injecting the role parameter during registration in Kanboard.
- 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-2026-29056?
CVE-2026-29056 is a high-severity vulnerability in kanboard, published on 18 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kanboard is project management software focused on Kanban methodology. Prior to 1.2.51, Kanboard's user invite registration endpoint (`UserInviteController::register()`) accepts all POST parameters and passes them to `UserModel::create()` without filtering out the `role` field. An attacker who receives an invite link can inject `role=app-admin` in the registration form to create an administrator account. Version 1.2.51 fixes the issue.
Weakness: CWE-915
Which versions are affected by CVE-2026-29056?
It affects 1 product.
Products include Kanboard Kanboard.
How do I fix CVE-2026-29056?
No fix has been published for CVE-2026-29056 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-29056 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29056 exists.
Other vulnerabilities in kanboard
- CVE-2026-21881 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass
- CVE-2025-55010 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events
- CVE-2024-51747 Arbitrary File Read and Delete in kanboard
- CVE-2024-51748 Remote code execution through language setting in kanboard
- CVE-2017-12850 Business logic in n/a
Sources
Also known as GHSA-2jvj-q44v-6p3x.