Git for Windows is the Windows port of the revision control system Git. Prior to Git for Windows version 2.39.2, when `gitk` is run on Windows, it potentially runs executables from the current directory inadvertently, which can be exploited with some social engineering to trick users into running untrusted code. A patch is available in version 2.39.2. As a workaround, avoid using `gitk` (or Git GUI's "Visualize History" functionality) in clones of untrusted repositories.
https://wiki.tcl-lang.org/page/exec
https://github.com/git-for-windows/git/security/advisories/GHSA-wxwv-49qw-35pm
https://github.com/git-for-windows/git/releases/tag/v2.39.2.windows.1
https://github.com/git-for-windows/git/commit/49a8ec9dac3cec6602f05fed1b3f80a549c8c05c