The 43-year-old was attending the premiere of his latest movie The Assassination of Jesse James at the Venice film festival when a fan lunged past security guards and wrapped her arms around his neck.
Although neither star nor fan were injured in the incident, Pitt has spoken of his anxiety over the episode.
"I haven't been jumped like that in a while," he said.
"It tells me that we're vulnerable. It's something I have been thinking about but I don't want to change my life to avoid those kind of things."
Pitt, who has four children with partner Angelina Jolie, added that the incident was part and parcel of being a celebrity.
"I've had break-ins in the house and I'm dealing with a recent one now," the Fight Club actor explained.
"You also develop a radar – you feel it when you are approached by unbalanced people."
