Cuba Gooding Jr. — who’s been in legal hot water with Manhattan prosecutors — extinguished a guest who caught on fire at a Hamptons party over Labor Day weekend.

Sources exclusively told Page Six that Gooding was with girlfriend Claudine De Niro at a “socially distanced Shabbat dinner” at the Bridgehampton home of a tech CEO. The source said when the host of the bash, “inadvertently set himself on fire,” that “Cuba jumped into action hero mode and doused him with water in front of frightened guests, who applauded once it was clear the guy was OK.”

A rep for Gooding confirmed the incident, commenting, “The back of the gentleman’s shirt ignited into flames from a candle that he unknowingly leaned back into while the Rabbi was giving the Shabbat prayer. The man started panicking and flailing his arms, and guests backed away from the victim — except for Cuba, who ran to the gentleman and doused the flames completely.”

Also at the “hot” outdoor party, we hear, were Mitch Modell, Libbie Mugrabi and Brock Pierce.

Gooding, 52, is also currently facing a criminal trial on misdemeanor sexual abuse and forcible touching charges, stemming from allegations of three accusers, and was sued by another woman last month.

He is being repped by attorneys Mark Heller and Peter Toumbekis, and has denied all the charges.

Additional reporting by Mara Siegler