That's a common concern. I had about 30-40 roaches escape once (I was still learning how to attach the lid). About 20 of them were found huddled around the warm base of the bin, they got a trip back in. The other 20 or so were found over the next week on their backs and shriveled up, they couldn't even survive the 65ºF winter temperatures in that room. And these roaches cannot climb so where are they going to get to that's secluded enough to breed?
Guppies (fish) breed like crazy, but I'll bet you wouldn't be concerned about your house becoming infested with guppies if a few got out of their tank. These roaches are the same.