ETCD TLS Authentication with CN is failing

[NBK27]

I have a ETCD Cluster with authentication enabled. I have created my user with root access. I have a set of client certs with Common Name as my user. I have several etcd clients (go and python) which are able to talk to etcd with the client certs. But my libcurl client is unable to talk to etcd with the same certs when authentication is enabled.
I get this response from etcd when trying to do a read/write.

CommonName of client sending a request against gateway will be ignored and not used as expected