A flaw was found in ansible 2.8.0 before 2.8.4. Fields managing sensitive data should be set as such by no_log feature. Some of these fields in GCP modules are not set properly. service_account_contents() which is common class for all gcp modules is not setting no_log to True. Any sensitive data managed by that function would be leak as an output when running ansible playbooks.
https://github.com/ansible/ansible/pull/59427
https://github.com/ansible/ansible/issues/56269
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10217
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00021.html