Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.
[
{
"product": "Nginx Controller",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "\"3.x before 3.4.0\""
}
]
}
]