A “vicious” French Bulldog at a posh Lower Manhattan building left a woman with serious leg injuries, according to a lawsuit.

Michele Caruso Roeser was at the 25 Park Row apartment of pals Kristin and Gerald Flattmann when the family’s dog, Bruce, “attacked, bit and assaulted” her, she claimed in a Manhattan Supreme Court lawsuit.

Roeser, a marketing and sales director at HBO, according to online profiles, claims the couple failed to control or restrain the pup.

Apartments in the building go for $4 million.

Roeser is seeking unspecified damages.

Her lawyer declined comment and the Flattmanns could not be reached.