From Longman Dictionary of Contemporary Englisha double-edged sword/weapona double-edged sword/weaponsomething that seems to be good, but that can have a bad effect Being famous is often a double-edged sword. → double-edged
Examples from the Corpus
a double-edged sword/weapon• But the potential financial boost is a double-edged sword.• It's been said before that being well-known is a double-edged sword.• This, however, rapidly proved a double-edged weapon.• Throughout our history, judicial review has been a double-edged sword.• The competition rules must be regarded as a double-edged sword by businesses.• That can be a double-edged sword, commercially and artistically. 