---
id: CVE-2026-102985
title: Plane is an open-source project management tool
summary: >-
  Plane is an open-source project management tool. In 1.3.1 and earlier,
  ProjectMemberViewSet.partial_update places its authorization checks inside the
  role update branch, so a guest or member can omit role and change another
  ProjectMember…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-862
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:17:28.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102985'
references:
  - url: >-
      https://github.com/makeplane/plane/commit/dc9d80b2d2a499b967f0b541e083b283f463719f
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/pull/9367'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/releases/tag/v1.4.0'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/security/advisories/GHSA-25gg-cxm8-g7h9'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-14T20:53:12.374Z'
vendor: makeplane
product: plane
affected:
  - plane < 1.4.0
---

## Overview

Plane is an open-source project management tool. In 1.3.1 and earlier, ProjectMemberViewSet.partial_update places its authorization checks inside the role update branch, so a guest or member can omit role and change another ProjectMember record's is_active field, including deactivating a project administrator. ProjectMemberPreferenceEndpoint.patch separately trusts the member_id path value and lets a project member overwrite another member's preferences. These missing object-level authorization checks permit membership disruption and cross-member preference tampering. The vulnerability is fixed in 1.4.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.