ICJ rejected both parties arguments. Requested Pakistan to provide further details of Indian Hindu Terrorist Kulbushan Yadev. Not only India, but Pakistan case was also weak according to current verdict of ICJ.
This is failure when a state prolong such spy related cases. Technically ICJ rejected Pakistan's case as well.
One favor for Pakistan, India has open a new gate to expose Indian terrorism. Previously because of strong Indian influence, United Nation ignores Pakistan dossier. Now Pakistan also submit petitions against Indian terrorism inside J&K as well.
India made every issue between Pakistan and India "Unilateral". Pakistan Case is STRONG at this point.