Makeplane Plane up to 1.3.x ProjectMemberPermission access control

Summaryinfo

A vulnerability marked as problematic has been reported in Makeplane Plane up to 1.3.x. Affected by this vulnerability is an unknown functionality of the component ProjectMemberPermission. Performing a manipulation results in access control. This vulnerability is known as CVE-2026-104962. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Makeplane Plane up to 1.3.x. It has been classified as problematic. This affects an unknown code of the component ProjectMemberPermission. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality. The summary by CVE is:

Plane is an open-source project management tool. Prior to 1.4.0, GET /api/v1/workspaces/{slug}/projects/{project_id}/members/ returns the complete project-member roster, including each member's email address, first and last name, display name, avatar, and role. ProjectMemberPermission gates the endpoint, but its SAFE_METHODS branch checks only whether the caller is an active ProjectMember of any project in the workspace and does not bind the check to view.project_id. The view then filters solely by the project_id supplied in the URL. Consequently, any authenticated user who belongs to one project in a workspace, including a Guest, can read the roster of another private project in the same workspace. This issue is fixed in 1.4.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-104962 since 10/02/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 1.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• Makeplane

Name

• Plane

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

• Product: https://github.com/makeplane/plane/

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