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

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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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Even with Lockdown Mode, ChatGPT could be still vulnerable to prompt injections, but the goal is to reduce the likelihood that sensitive data gets shared in the process.
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Sriram Krishnan is leaving his role as White House AI advisor

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Krishnan is reportedly starting a new institution to continue shaping Trump's AI policy.
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Founders share VC horror stories, and some are naming names

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A massive viral conversation sharing VC horror stories has taken place this week on X. Some are weird. Some are infuriating.
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Former cyber executive turned whistleblower accuses IBM of covering up several data breaches

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IBM and two of its subsidiary companies were allegedly breached during the mid-2010s, which a lawsuit filed by a former cybersecurity executive accuses IBM of not disclosing and actively covering up.
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Startup Battlefield 200 applications officially close in 3 days

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Applications for Startup Battlefield 200 officially close on June 8, 11:59 p.m. PT. Now’s not the time to wait any longer. Secure your shot at competing on the Disrupt Stage at TechCrunch Disrupt 2026 this October at San Francisco's Moscone West.
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