The alleged incident occurred early Wednesday morning, with the unidentified man entering her San Fernando Valley, Calif., house through a window before making himself at home somewhere inside, TMZ reported.
He reportedly didn't steal anything and left without being discovered. He did raid her pantry during his time inside, according to the gossip website.
Rose, 33, noticed that a window in her home had been broken later that afternoon, and she witnessed the man both coming in and leaving on security camera footage.
The reality star's mother and son were both sleeping at the house during the four hours that the perpetrator was inside, as were Rose's bodyguards and assistant, TMZ reported. As of Wednesday evening, police were investigating the incident.
An officer for the Los Angeles Police Department told the Daily News that they received a burglary call in Rose's neighborhood.
Rose is the latest big-name star to fall victim to a break-in in recent months. A$AP Rocky's home was robbed of approximately $1.5 million in jewelry and other items earlier this week, according to TMZ.
Nicki Minaj, Alanis Morissette and Kim Kardashian are among the other celebrities who have been burglarized since last fall.