TAINTED

To contaminate or corrupt (something) with an external agent, either physically or morally.

To spoil (food) by contamination.

To be infected or corrupted; to be touched by something corrupting.

To damage, as a lance, without breaking it; also, to break, as a lance, but usually in an unknightly or unscientific manner.

To hit or touch lightly, in tilting.

To thrust ineffectually with a lance.

Corrupted or filled with imperfections.

"Hey, get that away from me! It was bought with tainted money."

(of data) Originating from an untrusted source.

"Do not use tainted values in SQL queries."