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McKesson Breach: ShinyHunters Claims 284m Patient Records
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Fusion42 · 30 August 2026 · Fusion42 review
McKesson confirmed unauthorized access to third-party applications resulting in the theft of approximately 284 million patient records, including sensitive personal and medical information. The breach involved voice phishing attacks compromising employee Okta credentials, allowing attackers to access Salesforce and Snowflake environments and exfiltrate data over four days.
This Wire brief sits within Fusion42's coverage of Healthtech Infrastructure, and 2 sources have reported it between 28 Aug 2026 and 29 Aug 2026.
◆ ◆ The Wire takeaway
Healthcare founders must urgently reassess security around employee access and third-party apps to avoid similar breaches. Regulators will likely tighten patient data protection, making early compliance your competitive advantage.
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2 sources · first reported 28 Aug 2026 · latest 29 Aug 2026
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