CVE-2026-100623 Capgo Authentication Bypass via Direct PostgREST org_users Table Write
Authenticated organization admins can bypass invitation workflows to directly add users as admins, enabling unauthorized access and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100623?
CVE-2026-100623 is a high-severity authentication bypass vulnerability in Cap-go capgo.app, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Capgo (capgo.app) exposes the legacy membership table public.org_users directly through Supabase PostgREST. The table's row-level security policies "Allow org admin to insert" and "Allow org admin to update" only verify that the caller has admin rights in the target organization (public.check_min_rights('admin', ...)); they do not require a pending invitation in tmp_users, acceptance of an invite token via /private/accept_invitation, any action by the target user, or the membership/role-consistency and anti-escalation checks enforced by the RBAC role-binding path. As a result, an authenticated user who is an admin of an organization can INSERT or UPDATE org_users rows directly to add any existing public.users account as an active member of that organization with user_right="admin", bypassing the invitation and role-assignment workflow entirely. In testing, an account with no prior access to the organization or its apps could, after such a direct insert, read the organization and app and pass check_min_rights. All versions are affected and no patch was available at the time of publication.
Weakness: CWE-863
Which versions are affected by CVE-2026-100623?
How do I fix CVE-2026-100623?
No fix has been published for CVE-2026-100623 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-100623 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100623 exists.
Sources
Also known as GHSA-9x83-rrg6-9pr9.