Terrifying moment for Kristin Cavallari — she revealed she once caught an intruder inside her bedroom while she was sleeping alongside her young son Cam.

The reality star explained on her “Let’s Be Honest” podcast … saying the nightmare occurred during a 2020 family trip to the Bahamas, where they stayed for a month amid pandemic restrictions.

She said one night, they had to call some workers because the house’s HVAC unit broke — noting at the same time, she had her Uncommon James jewelry brand laid out in her closet.

Kristin recalled waking up to a man crawling on her bedroom floor that night, and, half-asleep, she yelled, “What the f*** are you doing?”

She said the guy — who was wearing a ski mask, black long-sleeve shirt, and black pants — quickly stood up and bolted out the door.

KC said that while most people would’ve screamed in that situation, her instincts kicked in because Cam was in bed with her … so, she stayed quiet, despite feeling like she was in “Mission: Impossible.”

She said it wasn’t until she woke up her ex, Jay Cutler, who was upstairs with their other 2 sons, that the situation really hit her. She called the ordeal one of the scariest things she’s ever gone through.