How a Coupang Data Breach Became a US-South Korea Diplomatic Crisis

Coupang's data breach sparks diplomatic tensions, halting US-South Korea defense talks and straining the alliance.

Apr 30, 2026

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What started as a corporate data breach has snowballed into a serious diplomatic rift. South Korean e-commerce giant Coupang disclosed in November that a former employee stole an internal security key, exposing data from 33.7 million users. Seoul launched a sweeping crackdown — police raids, tax audits, parliamentary hearings — but Korean-American CEO Bom Kim refused to appear. Washington reportedly pushed back, signaling it would pause high-level defense talks unless South Korea guaranteed Kim would face no legal consequences. The fallout has affected nuclear submarine cooperation talks and drawn 54 Republican lawmakers to accuse Seoul of targeting a US company. Analysts warn the alliance is nearing a "critical threshold of strain."

Source: The Guardian

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