CVE-2026-100629: Cap-Go Capgo.app

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Capgo (capgo.app backend) before 12.127.5 contains an authorization flaw in the PATCH /private/role_bindings/:binding_id endpoint. The handler verifies that the newly assigned role's priority rank does not exceed the caller's own rank, but — unlike the DELETE handler — it never checks the rank of the role currently bound to the target binding. An authenticated user holding the org_admin role (rank 90) can therefore change an org_super_admin binding (rank 95) to a lower-privileged role such as org_member (rank 75). Because the prevent_last_super_admin_binding_delete database trigger fires only BEFORE DELETE and not on UPDATE, an org_admin can demote every org_super_admin, leaving the organization with no super administrator. The issue is fixed in 12.127.5.

Affected products

• Cap-Go Capgo.app: before 12.127.5 (fixed in 12.127.5)

Published 2026-09-26. Last modified 2026-10-05.