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ColdRecon / Breach Radar / McKesson
Breach Record

McKesson

DISCLOSED 2026-09-04 · UNKNOWN · 284,000,000 RECORDS EXPOSED

McKesson disclosed a cyberattack in an SEC filing. The ShinyHunters threat group claims to have stolen 284 million records. No further details about the attack vector or data types were provided.

The record

What we know

Disclosed
2026-09-04
Sector
Healthcare
Country
USA
Records exposed
284,000,000
Sources

Cited reporting

This page is the permanent ColdRecon entry for the McKesson disclosure. It updates if new public reporting emerges. All tracked breaches →

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