A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.
https://www.ibm.com/support/pages/node/6501909
https://security.netapp.com/advisory/ntap-20211203-0001/
https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQY