---
id: CVE-2026-105635
title: >-
  Plane: Unauthenticated Project Invitation Email Disclosure Enables
  Unauthorized Project Join Without Token
summary: >-
  Plane is an open-source project management tool. Prior to 1.4.0,
  ProjectJoinEndpoint at GET
  /api/workspaces/{slug}/projects/{project_id}/join/{pk}/ uses
  permission_classes = [AllowAny] and returns the full ProjectMemberInvite
  record, inc…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-200
  - CWE-284
  - CWE-862
vendor: makeplane
product: plane
affected:
  - plane < 1.4.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T18:01:52.446Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105635'
references:
  - url: 'https://github.com/makeplane/plane/security/advisories/GHSA-2r58-hgv7-635q'
    label: 'https://github.com/makeplane/plane/security/advisories/GHSA-2r58-hgv7-635q'
  - url: 'https://github.com/makeplane/plane/pull/9305'
    label: 'https://github.com/makeplane/plane/pull/9305'
  - url: >-
      https://github.com/makeplane/plane/commit/4b52dce76e8aa97a8d87166fa8f4441c1cf646b1
    label: >-
      https://github.com/makeplane/plane/commit/4b52dce76e8aa97a8d87166fa8f4441c1cf646b1
  - url: 'https://github.com/makeplane/plane/releases/tag/v1.4.0'
    label: 'https://github.com/makeplane/plane/releases/tag/v1.4.0'
tags:
  - cve.org
ingestedAt: '2026-10-05T18:29:11.217Z'
---

## Overview

Plane is an open-source project management tool. Prior to 1.4.0, ProjectJoinEndpoint at GET /api/workspaces/{slug}/projects/{project_id}/join/{pk}/ uses permission_classes = [AllowAny] and returns the full ProjectMemberInvite record, including its email, token, and role, to unauthenticated callers. The corresponding POST endpoint checks only whether the submitted email matches project_invite.email and does not validate the invitation token. An attacker who knows the invitation UUID can discover the invited email, register an account with that email, and accept the invitation without receiving the original invite. This issue is fixed in 1.4.0.

## Affected

- `plane < 1.4.0`

## Remediation

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