A significant data breach occurred at Coupang, a major online shopping platform in Asia, in December 2025. This incident has resulted in millions of customers’ data being accessed with unauthorized access to names, contact numbers, details of card payments and order history. As industrial institutions continue to migrate towards a cloud-native application platform along with high-cycle DevOps methodologies, incidents like this demonstrate one critical fact; security should never be an afterthought. Coupang serves as a case study for developers, cloud engineers and security personnel on how things could be executed successfully. This article will examine what went wrong during this incident, how could attackers have taken advantage of vulnerabilities within Coupang’s systems, and how with compliant security methodologies such activities could be avoided in the future. What Happened During the Coupang Breach? According to public information and cybersecurity reports, attackers stole de...