The docker CLI tool is normally executed with user privileges, but there's dockerd, a daemon running as root that actually does the container execution.
often, docker in docker is used to manage docker orchestration. putinng a user in a docker and peoviding docker access is security through obscurity.
on the flip side, i see people blindly installing tools and skills not understanding they are pushing context and capabilities without any significant security features.
Imagine mythos is actually exceptional hacker. if you give it a well crafted malicious prompt, its going to even more insecure.
the double edged sword is really fascinating to think about
Almost everyone I know installs docker rootless.
"Rootless mode lets you run the Docker daemon and containers as a non-root user."
https://docs.docker.com/engine/security/rootless/
This is how docker is best installed on Linux, and there's a convenience script for it as well (https://get.docker.com/rootless). I am surprised that's not how people are using docker.