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breaches incidents
ShinyHunters expose 6.4M in attack on medical supplier McKesson
ShinyHunters claimed responsibility for a cyberattack on medical supplier McKesson that exposed data for approximately 6.4 million individuals, according to Have I Been Pwned. The breach, which occurred in August 2026, represents one of the largest healthcare supply chain incidents on record. ShinyHunters is a known threat group that targets organizations across multiple sectors for extortion.
Why it matters: Healthcare providers, hospitals, and pharmacies relying on McKesson for supplies and services should assume customer and patient data may have been compromised and prepare breach notification responses; security teams should monitor for exposed credentials and personally identifiable information being sold or used in follow-on attacks.
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