The Kubernetes client-go library logs request headers at verbosity levels of 7 or higher. This can disclose credentials to unauthorized users via logs or command output. Kubernetes components (such as kube-apiserver) prior to v1.16.0, which make use of basic or bearer token authentication, and run at high verbosity levels, are affected.
https://security.netapp.com/advisory/ntap-20190919-0003/
https://github.com/kubernetes/kubernetes/issues/81114
https://access.redhat.com/errata/RHSA-2019:4087