The sudo password was embedded in shell commands via single-quote
interpolation: echo '{password}' | sudo -S
If the password contained shell metacharacters (single quotes,
$(), backticks), they would be interpreted by the shell, enabling
arbitrary command execution.
Fix: use shlex.quote() which properly escapes all shell-special
characters, ensuring the password is always treated as a literal
string argument to echo.
25e260bb3a