Percona XtraDB Cluster Update

Hi all,
I run a percona XtraDB cluster the actual version installed percona-xtradb-cluster-server-5.6 5.6.35-26.20-3.
The mysql version installed is 5.6.35-81.0 and it looks that some security patch are missing [url]Oracle Critical Patch Update Advisory - April 2017
Is already someone of you guys concerned with this problem?
Would be appreciated if you can share how are you dealing with this issue.

Many thanks