---
id: CVE-2026-105640
title: >-
  Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed
  GitLab)
summary: >-
  Plane is an open-source project management tool. Prior to 1.4.0, Plane trusts
  email addresses returned by Gitea OAuth and by self-managed GitLab OAuth
  deployments where email confirmation is disabled, without verifying that the
  provider …
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-287
  - CWE-290
vendor: makeplane
product: plane
affected:
  - plane < 1.4.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T18:11:35.680Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105640'
references:
  - url: 'https://github.com/makeplane/plane/security/advisories/GHSA-7j95-vh8g-f365'
    label: 'https://github.com/makeplane/plane/security/advisories/GHSA-7j95-vh8g-f365'
  - url: 'https://github.com/makeplane/plane/pull/9289'
    label: 'https://github.com/makeplane/plane/pull/9289'
  - url: >-
      https://github.com/makeplane/plane/commit/b91b61c379908d9e451613dbca23fc3803e926d2
    label: >-
      https://github.com/makeplane/plane/commit/b91b61c379908d9e451613dbca23fc3803e926d2
  - 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: '2026-10-05T18:29:11.209Z'
---

## Overview

Plane is an open-source project management tool. Prior to 1.4.0, Plane trusts email addresses returned by Gitea OAuth and by self-managed GitLab OAuth deployments where email confirmation is disabled, without verifying that the provider authenticated ownership of the address. An attacker can set an OAuth identity's unverified provider email to a victim's address, which Plane matches directly to the victim's existing local account. The attacker can then log in to the victim's Plane account without knowing the victim's password. GitHub, GitLab.com, and Google are not affected because those providers return verified email addresses. 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.