There was an command injection vulnerability in Sourcetree for Windows from version 0.5a before version 3.0.10 via URI handling. A remote attacker could send a malicious URI to a victim using Sourcetree for Windows to exploit this issue to gain code execution on the system.
https://seclists.org/bugtraq/2019/Mar/30
https://jira.atlassian.com/browse/SRCTREEWIN-11291