Prefect version 3.6.23 is vulnerable to remote code execution due to improper handling of user-controlled input in the "GitRepository" storage class. The "commit_sha" parameter, which is passed to git commands, lacks validation and does not include a "--" separator to distinguish user input from git flags. This allows attackers to inject arbitrary git flags, such as "--upload-pack", enabling execution of external programs. Additionally, the "directories" parameter can be exploited to inject git flags during sparse-checkout operations. These vulnerabilities allow any user with deployment creation permissions to execute arbitrary commands on worker machines, compromising shared work pools in multi-tenant environments.