Privilege escalation in Makeplane Plane
CVE-2026-105634
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Makeplane Plane — versions < 1.3.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-105634?
- CVE-2026-105634 is a high-severity vulnerability in Makeplane Plane, classified under Improper Privilege Management. CVSS score: 8.1/10. Published 2026-10-05.
- How severe is CVE-2026-105634?
- High severity. CVSS v3 base score is 8.1 out of 10.