Otto runs shell commands, edits files and drives a browser on the machine it is installed on. The workspace boundary confines the file tools; the shell is not confined, and the README says so. Please read that section before running it against anything you have not committed.
Report privately through GitHub's security advisory form rather than a public issue. Include what you ran, what happened, and why it matters. You will get an acknowledgement within a few days.
Issues of this kind are in scope: a tool reaching outside the workspace root,
a URL check that can be bypassed, a prompt that lets a page steer the next
request, secrets written anywhere but .env.