The principle of sovereignty is one of the cornerstone norms of modern international law. The precise content and meaning of this fundamental principle have changed significantly in historical and political contexts, often sparking intense debates. Today, one of the most critical questions regarding sovereignty is how this principle can be applied in cyberspace. In recent years, the number of hostile cyber operations between states has increased dramatically. By the beginning of the 2020s, various international organizations had already recorded more than a hundred incidents annually. The aim of this study is to examine how international legal literature views the relationship between state sovereignty and cyberspace, to show the current state practice, and to introduce some recent cyber operations that are relevant to the issue.