CVE-2026-88863

capgo.app (npm package `capgo`) through version 12.207.1 does not compare the caller's role rank against the requested role in the validateInvite() function of supabase/functions/_backend/private/invite_new_user_to_org.ts. The POST /private/invite_new_user_to_org endpoint only requires the org.update_user_roles permission for org_super_admin invitations, so an authenticated user holding only the org.invite_user permission (e.g., an org_member) can invite an external user as org_admin or org_billing_admin. When the invited account accepts the invitation via POST /private/accept_invitation, ensureOrgMembership creates the role binding using the Supabase service-role key, which bypasses the prevent_role_binding_priority_escalation and check_org_user_privileges database triggers. This allows privilege escalation resulting in full administrative control over the organization's apps, channels, members, and billing. The issue is addressed by pull request #3096, which compares the inviter's rank before permitting elevated invitations.

• CWE-269

• https://github.com/Cap-go/capgo.app/security/advisories/GHSA-7g7p-fxx8-4wm8
• https://www.vulncheck.com/advisories/capgo-app-through-12.207.1-privilege-escalation-via-invite-new-user-to-org

Published

Sep 10, 2026

Last Modified

Sep 10, 2026

Status

Deferred

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