Hammer CLI, a CLI utility for Foreman, before version 0.10.0, did not explicitly set the verify_ssl flag for apipie-bindings that disable it by default. As a result the server certificates are not checked and connections are prone to man-in-the-middle attacks.
https://bugzilla.redhat.com/show_bug.cgi?id=1436262
https://access.redhat.com/errata/RHSA-2018:0336