The author discusses the modern international legal framework governing the application of sanctions. The author focuses on the following issues: international and regional sanctions in the context of the UN Charter, restrictions on sanctions regimes, sanctions in humanitarian law, the legitimacy of unilateral economic sanctions. The methodological base of this work is a systematic approach, which allows to consider sanctions as part of the modern international legal system. As a result of the study, it was revealed that within the framework of the existing international legal system, only the UN Security Council is authorized to impose sanctions in order to ensure global peace and security. The resolutions of the UN Security Council on the issue of the application of restrictive measures are dominant in comparison with the decisions of other international bodies and the obligations of member countries under international treaties. The legitimacy of applying regional sanctions is limited by the statutes of regional organizations. The novelty of the study lies in a comprehensive consideration of the reasons why unilateral sanctions are a violation of international law. Unilateral economic restrictions violate the free trade regime of the WTO and the principle of non-discrimination that underpins the GATT. They represent a violation of the fundamental principles of sovereign equality, as well as the principle of non-interference in the internal affairs of other states. As a result of the application of economic sanctions by certain states, extraterritorial jurisdiction is manifested, which creates a dangerous precedent for international law.