---
id: CVE-2026-102981
title: Plane is an open-source project management tool
summary: >-
  Plane is an open-source project management tool. Prior to 1.4.0, self-hosted
  Plane deployments allow unauthenticated GET requests to
  api/workspaces/{slug}/invitations/{pk}/join/ through WorkspaceJoinEndpoint,
  whose WorkSpaceMemberInviteS…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-200
  - CWE-639
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T16:17:10.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102981'
references:
  - url: >-
      https://github.com/makeplane/plane/commit/6220ba990b2276a1a1979d1d5df68f650b8b47ad
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/pull/9297'
    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-gf48-p6jp-cwc4'
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-13T16:35:46.736Z'
---

## Overview

Plane is an open-source project management tool. Prior to 1.4.0, self-hosted Plane deployments allow unauthenticated GET requests to api/workspaces/{slug}/invitations/{pk}/join/ through WorkspaceJoinEndpoint, whose WorkSpaceMemberInviteSerializer exposes the secret invitation token directly and through get_invite_link. An external attacker can retrieve a token intended for another user and submit it to the invitation acceptance flow, joining the workspace without receiving the invitation and gaining the role assigned to the invite. This issue is fixed in version 1.4.0.

## Remediation

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