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 CEO Bom Kim refused to appear. Washington reportedly pushed back, signalling it would pause high-level defence talks unless Kim faced no legal consequences. The fallout has stalled 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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