I need to understand if the below code will lead to password leak when the below function is called:

#!/bin/sh

function call_function() {
  password=$1
  echo $password | sed 's/$/\$/g'
}

password1=$(call_function "abcd")

Will the above function return lead to any security risk?

I did try using ps -ef and trying to catch the password however i was not able to see password getting caught.