The man, who is in his 30s, was attacked at the property in Argenta Walk at about 04:00 GMT on Monday.
Chief Insp Stephen McCauley said: "We believe an altercation of some kind has taken place in the house which has led to the man being stabbed."
He added a number of men "hurriedly" left the house. The victim's injury is not believed to be life-threatening.
A man has been stabbed in the back during a house party in Ballymena, County Antrim.