Your program may be subject to hacking etc. One way to protect yourself from this type of activity is to create a copy of your current machine envronment and run your program using a system called chroot.
From viewpoint of your program its executing in a normal envronment, from a security aspect, if somebody breaks your program it only has access to the elements you provided when you made the copy.
Such a setup is called a chroot jail for more details see chroot jail.
Its normally used for setting up publicly accessible servers etc.