Quick answers
- Is CVE-2026-105640 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105640 being exploited in the wild.
- How severe is CVE-2026-105640?
- Critical severity, with a CVSS score of 9.1, published 5 October 2026.
- Which products and versions are affected?
- Makeplane Plane prior to 1.4.0.
- Is there a fix for CVE-2026-105640?
- Yes: fixed in 1.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-105640 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-105640?
- Check whether you run Makeplane Plane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 1.4.0
Technical details
Plane trusts unverified email addresses from Gitea OAuth and self-managed GitLab OAuth (when email confirmation is disabled) and matches them directly to existing local accounts. An attacker can set an OAuth identity's email to a victim's address and gain authentication without proving ownership. The vulnerability requires the attacker to control an OAuth account with the target OAuth provider and the victim to have an existing Plane account with that email address.
Affected products
- makeplane Plane prior to 1.4.0
Timeline
- 2026-10-05: disclosed
- 2026-07-09: patched: fix merged in PR #9289