# CVE-2026-104974: Plane authentication bypass in account deactivation

Source: https://junglewise.ai/threats/cve-2026-104974-plane-is-an-open-source-project-management-tool-prior-to-1-4-0-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-104974 · Severity: high · CVSS 8.1 · Published 2026-10-05

Plane is an open-source project management tool that teams use to organize work and coordinate projects. A vulnerability allows a deactivated user account to log in and automatically reactivate itself without administrator notification, potentially granting an ex-employee or compromised account access to sensitive project data and team information.

Technologies: [Plane](https://junglewise.ai/threats/technologies/plane-plane). Vendors: [Plane](https://junglewise.ai/threats/vendors/plane).

## Quick answers

**Is CVE-2026-104974 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104974 being exploited in the wild.

**How severe is CVE-2026-104974?** High severity, with a CVSS score of 8.1, published 5 October 2026.

**Which products and versions are affected?** Plane before 1.4.0.

**Is there a fix for CVE-2026-104974?** 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-2026-104974 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-104974?** Check whether you run 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

The authentication handler in Plane unconditionally sets is_active=True during login, silently reactivating any admin-deactivated account. An attacker with valid credentials to a deactivated account can authenticate successfully and gain full access to the account and associated workspaces. The vulnerability exists in the save_user_data() and complete_login_or_signup() functions and affects versions prior to 1.4.0.

## Affected products

- Plane Plane before 1.4.0

## Timeline

- 2026-10-05: disclosed
- 2026-10-05: patched: Fix released in version 1.4.0

## References

- [https://github.com/makeplane/plane/commit/1e8f3630c7697129b61eb57f2453f0bf09224920](https://github.com/makeplane/plane/commit/1e8f3630c7697129b61eb57f2453f0bf09224920)
- [https://github.com/makeplane/plane/commit/6c9dbb50434d16ea00a00d1574723dfd0c3d2446](https://github.com/makeplane/plane/commit/6c9dbb50434d16ea00a00d1574723dfd0c3d2446)

## Related threats

- [Plane project management missing authorization checks](https://junglewise.ai/threats/cve-2026-102985-plane-is-an-open-source-project-management-tool-in-1-3-1-and)
- [Plane order_by injection in issue-listing endpoints](https://junglewise.ai/threats/cve-2026-102988-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane stored XSS in comments and intake descriptions](https://junglewise.ai/threats/cve-2026-102982-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane workspace invitation token disclosure and hijack](https://junglewise.ai/threats/cve-2026-102981-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane hardcoded Django SECRET_KEY in community deployments](https://junglewise.ai/threats/cve-2026-105641-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)