Cameron Douglas just can’t keep his nose clean.

The drug-dealing son of actor Michael Douglas got caught with “contraband” in the slammer after cutting his sweetheart cooperation deal with the feds, a lawyer for one of his alleged suppliers revealed yesterday.

But “most shocking of all,” Douglas also got an unidentified female lawyer to smuggle him forbidden goodies while he was awaiting sentencing, defense lawyer Louis Aidala said.

Aidala didn’t identify the woman or specify any of the contraband.