---
title: "Data breach at McKesson"
description: "In August 2026, McKesson suffered a data breach. 6.4 million accounts were affected. The exposed data includes dates of birth, email addresses, employment data, names, health data, phone numbers and postal addresses."
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-08-21-mckesson
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-10
dateModified: 2026-09-10
---
# McKesson

Data breach — Critical

In August 2026, McKesson suffered a data breach. 6.4 million accounts were affected. The exposed data includes dates of birth, email addresses, employment data, names, health data, phone numbers and postal addresses.

| Fact | Value |
| --- | --- |
| Disclosed on | September 10, 2026 |
| Incident dated | August 21, 2026 |
| Accounts affected | 6.4M |
| Sector | Healthcare |
| Country | International or undetermined |
| Cause | Undisclosed |
| Severity | Critical |
| Status | Confirmed |

## Exposed data

- Date of birth
- Email address
- Employment data
- Full name
- Health data
- Phone number
- Postal address

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- Health data is “special category” data under the GDPR: a leak opens a right to compensation, and the organisation must notify the DPA within 72 hours.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Have I Been Pwned — McKesson](https://haveibeenpwned.com/Breach/McKesson) — Have I Been Pwned (CC BY 4.0)

_Entry built from Have I Been Pwned’s structured data, with no model rewriting._

---

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