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