CVE-2026-102981 Plane: Unauthenticated Workspace Invitation Token Leakage
Unauthenticated attackers can retrieve workspace invitation tokens to join projects and gain unauthorized access to self-hosted Plane instances.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102981?
CVE-2026-102981 is a medium-severity vulnerability in makeplane plane, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Plane is an open-source project management tool. Prior to 1.4.0, self-hosted Plane deployments allow unauthenticated GET requests to api/workspaces/{slug}/invitations/{pk}/join/ through WorkspaceJoinEndpoint, whose WorkSpaceMemberInviteSerializer exposes the secret invitation token directly and through get_invite_link. An external attacker can retrieve a token intended for another user and submit it to the invitation acceptance flow, joining the workspace without receiving the invitation and gaining the role assigned to the invite. This issue is fixed in version 1.4.0.
Which versions are affected by CVE-2026-102981?
How do I fix CVE-2026-102981?
No fix has been published for CVE-2026-102981 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102981 being exploited?
There is no known exploitation of CVE-2026-102981 in the wild and no public exploit code.
Sources
Also known as GHSA-gf48-p6jp-cwc4.