A command injection vulnerability exists in mlflow/mlflow when serving a model with "enable_mlserver=True". The "model_uri" is embedded directly into a shell command executed via "bash -c" without proper sanitization. If the "model_uri" contains shell metacharacters, such as "$()" or backticks, it allows for command substitution and execution of attacker-controlled commands. This vulnerability affects the latest version of mlflow/mlflow and can lead to privilege escalation if a higher-privileged service serves models from a directory writable by lower-privileged users.