This is an old issue, but this is also a critical one in need of necroing.
This may cause someone to start broadcasting their microphone with no way of stopping it without physical access to the other machine. The user also may not even know that a mic somewhere else is broadcasting! This is a serious privacy issue and needs to be fixed.
I am tired of Valve allowing issues to go unfixed for years at a time. This is unacceptable.
Two years and counting that this security vulnerability has not been fixed.
2 years, 5 months, 12 days and counting.
Presumably fixed, because I don't care to check, and Steam chat had been totally redone since then. @gdrewb-valve boooo
Nothing extracted yet.
This was only tested in group chat, although it might also have issues in single-user chats.
If you're logged in on multiple machines and have a group chat open on two or more of them, and start voice chat, voice chat will sometimes start on another machine.