When chatting on IRC, it is possible to leak data like OS, CPU type if the IRC client happens to leak it in VERSION string. Anybody doing /CTCP VERSION can see it. Same about timezone (/CTCP TIME). This can be mitigated by turning replies to CTCP queries off. Also, IP address is leaked to others (/whois nickname will show it if it's not cloaked).
By analogy, does the mumble client expose such sensitive data to others that are connected to the same server? If it does, what are the ways to mitigate this?