Hacked, leaked, and held for ransom: the worst breaches of 2026 so far

June 7, 2026 Zack Whittaker

From a massive DOGE data breach and the hacking of critical energy and water systems to the hack of an FBI surveillance system, here are the most damaging security incidents and data breaches of 2026.

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OpenAI unveils Lockdown Mode to protect sensitive data from prompt injection attacks
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