makeplane Plane up to 1.3.x Update Endpoint improper authorization

Summaryinfo

A vulnerability was found in makeplane Plane up to 1.3.x. It has been rated as problematic. The impacted element is an unknown function of the component Update Endpoint. The manipulation leads to improper authorization. This vulnerability is documented as CVE-2026-104964. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in makeplane Plane up to 1.3.x. This issue affects an unknown function of the component Update Endpoint. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity. The summary by CVE is:

Plane is an open-source project management tool. Prior to 1.4.0, Plane's project update endpoint authorizes the caller against the workspace slug in the request URL but loads the target project globally by UUID without binding it to that workspace. An administrator of one workspace can modify a project in another workspace when the victim project UUID is known. This violates tenant isolation and permits unauthorized cross-workspace changes to project metadata and configuration. This issue is fixed in 1.4.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-104964 since 10/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1548.002 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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