CVE-2026-105634 Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles
A guest user can demote administrators and members, effectively taking control of the project by bypassing role restrictions.
- 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-2026-105634?
CVE-2026-105634 is a high-severity vulnerability in makeplane plane, published on 5 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Plane is an open-source project management tool. Prior to 1.3.0, the ProjectMemberViewSet.partial_update method allows any project member, including a user with the lowest GUEST role, to modify another project member's role. The authorization check prevents assigning a role higher than the requester's role but does not prevent assigning a lower or equal role, allowing a Guest to demote Administrators and Members and deny them project control. This vulnerability is fixed in 1.3.0.
Weakness: CWE-269
Which versions are affected by CVE-2026-105634?
How do I fix CVE-2026-105634?
No fix has been published for CVE-2026-105634 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105634 being exploited?
There is no known exploitation of CVE-2026-105634 in the wild and no public exploit code.
Sources
Also known as GHSA-494h-3rcq-5g3c.