# CVE-2026-104955: Plane project member role-change authorization bypass

Source: https://junglewise.ai/threats/cve-2026-104955-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-2026-104955 · Severity: medium · CVSS 5.4 · Published 2026-10-05

Plane is an open-source project management tool that controls team access and permissions. A vulnerability before version 1.4.0 allows project members to elevate other members' roles without proper authorization, bypassing approval workflows and granting unauthorized access to project capabilities. An attacker could escalate a guest account to full member status or re-role other team members, compromising project governance.

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

## Quick answers

**Is CVE-2026-104955 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104955 being exploited in the wild.

**How severe is CVE-2026-104955?** Medium severity, with a CVSS score of 5.4, published 5 October 2026.

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

**Is there a fix for CVE-2026-104955?** 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-2026-104955 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-104955?** 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

The project member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ validates role changes by blocking assignments to roles higher than the requester's own role, but fails to block equal-role assignments. Additionally, the is_workspace_admin variable is derived from the target member's workspace role rather than the requester's, allowing non-admin users to modify workspace admins' project roles. An authenticated project member can send a PATCH request to reassign roles to other members or guests, bypassing role hierarchy checks and governance controls.

## Affected products

- Makeplane Plane before 1.4.0

## Timeline

- 2026-10-05: disclosed

## References

- [https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e](https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e)
- [https://github.com/makeplane/plane/pull/9014](https://github.com/makeplane/plane/pull/9014)

## Related threats

- [makeplane plane rate limit bypass via X-Forwarded-For header](https://junglewise.ai/threats/cve-2026-111869-a-vulnerability-was-identified-in-makeplane-plane-up-to-1-4-2)
- [Plane account takeover via unverified OAuth email](https://junglewise.ai/threats/cve-2026-105640-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane project management asset IDOR in bulk-asset endpoint](https://junglewise.ai/threats/cve-2026-105637-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane privilege escalation in project member role updates](https://junglewise.ai/threats/cve-2026-105634-plane-is-an-open-source-project-management-tool-prior-to-1-3-0)
- [Plane project management tool asset access control bypass](https://junglewise.ai/threats/cve-2026-105631-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)