The PCB has conveyed to the ICC that security is not an issue in the country which successfully hosted England and New Zealand recently and promised the same for the Champions Trophy
source https://sports.ndtv.com/cricket/65-million-icc-sanctions-and-pakistan-cricket-board-faces-severe-loss-if-champions-trophy-row-escalates-7010445#rss-sports-cricket
source https://sports.ndtv.com/cricket/65-million-icc-sanctions-and-pakistan-cricket-board-faces-severe-loss-if-champions-trophy-row-escalates-7010445#rss-sports-cricket