CVE-2022-21696

OnionShare is an open source tool that lets you securely and anonymously
share files, host websites, and chat with friends using the Tor network. In
affected versions it is possible to change the username to that of another
chat participant with an additional space character at the end of the name
string. An adversary with access to the chat environment can use the rename
feature to impersonate other participants by adding whitespace characters
at the end of the username.