莫迪凯·瓦努努（希伯来语：מרדכי ואנונו‎，1954年10月14日－），又名约翰·克罗斯曼（英语：John Crossman），是前以色列核武技术员，声称由于反对大杀伤力武器，1986年向英国传媒揭露以色列核武计划。其后他被以色列情报特务局（俗称摩萨德）的特工诱至意大利后，被以色列情报人员下药及绑架。他被带到以色列，在一场闭门审讯中被定罪。

瓦努努被囚18年，有超过11年被单独囚禁。2004年刑满出狱后，他受到言论和行动上极多限制。出狱后有数次因违反限制令被捕，包括数次接受外国记者访问及企图离开以色列。他说他在囚时受到以色列当局「残酷且野蛮的对待」，又说他要是没从犹太教改信基督教，待遇便会不同。

Mordechai Vanunu (Hebrew:מרדכי ואנונו‎; born 14 October 1954), also known as John Crossman, is an Israeli former nuclear technician and peace activist who, citing his opposition to weapons of mass destruction, revealed details of Israel's nuclear weapons program to the British press in 1986. He was subsequently lured to Italy by a Mossad agent, where he was drugged and abducted by Israeli intelligence agents. He was transported to Israel and ultimately convicted in a trial that was held behind closed doors.