This article tackles legal aspects of hybrid warfare activities in cyberspace. It endeavors to explore and to understand how hybrid threats employed by authoritarian regimes undermine international order and challenge the applicability of international principles and standards. The paper attempts to dissect the changing security reality, and the challenge for liberal democracy coming from hybrid warfare activity through cyberspace. The article illuminates the international legal challenges that NATO democracies face amid growing hybrid threats via cyberspace posed by authoritarian regimes.