Maintainers for munin-node are Munin Debian Maintainers <team+munin@tracker.debian.org>.
You may want to refer to the following packages that are part of the same source: libmunin-master-perl, libmunin-node-perl, libmunin-perl, libmunin-plugin-http-perl, libmunin-plugin-perl, libmunin-plugin-pgsql-perl, libmunin-plugin-snmp-perl, munin, munin-async, munin-common, munin-doc, munin-plugins-core, munin-plugins-dns, munin-plugins-extra, munin-plugins-http, munin-plugins-irc, munin-plugins-java, munin-plugins-jenkins, munin-plugins-ldap, munin-plugins-mail, munin-plugins-mysql, munin-plugins-network, munin-plugins-pgsql, munin-plugins-snmp, munin-plugins-time.
You might like to refer to the munin-node package page, to the Package Tracking System, or to the source package src:munin's bug page.
If you find a bug not listed here, please report it.