It happened Sunday afternoon on West Demarest Avenue in Englewood.
Police say the attacker and victim were fighting in a parking lot when the victim was stabbed.
He's in the hospital with life-threatening injuries.
A $1,000 reward is being offered for information leading to an arrest. The attacker is believed to have gotten away in a dark-colored vehicle.
Tips can be made anonymously on the group's website at www.bergencrimestoppers.org or by calling 844-466-6789 24 hours a day, seven days a week.
ALSO READ: Terrifying machete attack inside NYC bodega
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