What’s Vulnerable › Vulnerabilities

CVE-2026-105634: Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-06
• Weakness: CWE-269

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.

Affected products

• makeplane plane: before 1.3.0

References

• https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521
• https://github.com/makeplane/plane/pull/8833
• https://github.com/makeplane/plane/releases/tag/v1.3.0
• https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c

Get alerted when CVE-2026-105634 or the next vulnerability affects your stack