This codemod sets the shell keyword argument to False in subprocess module function calls that have set it to True.

Setting shell=True will execute the provided command through the system shell which can lead to shell injection vulnerabilities. In the worst case this can give an attacker the ability to run arbitrary commands on your system. In most cases using shell=False is sufficient and leads to much safer code.

The changes from this codemod look like this:

 import subprocess
- subprocess.run("echo 'hi'", shell=True)
+ subprocess.run("echo 'hi'", shell=False)

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