Luis Sanchez-Herrea, 24, is facing charges of assault, possession of a deadly weapon and related offenses after the incident in an apartment in Newark, Del. about 3 a.m. Saturday.
Police said the attack started with an altercation in the apartment. The fight spilled into a bedroom, where Sanchez-Herrera allegedly grabbed the sword and struck the victim in the hand.
He was rushed to Christiana Hospital and received 20 stitches. According to CBS affiliate KYW, police recovered a 3-foot-long sword at the scene.
The incident remains under investigation.