---
id: CVE-2026-105634
title: Plane is an open-source project management tool
summary: >-
  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 authoriz…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-269
vendor: makeplane
product: plane
affected:
  - plane < 1.3.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T19:17:17.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105634'
references:
  - url: >-
      https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/pull/8833'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/releases/tag/v1.3.0'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-05T18:29:11.217Z'
---

## Overview

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.

## Remediation

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