Healthcare

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investigation open

Updated about 2 months ago

McKesson Corporation Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving McKesson Corporation.
•Discovered on August 31, 2026.
•Confirmation level: Confirmed by company.

Breach confirmed

The McKesson Corporation breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

McKesson Corporation disclosed a cybersecurity incident affecting its information systems, reported on August 31, 2026. The company stated that its investigation was in an early stage.

At the time of disclosure, McKesson's filing did not specify the types of data exposed or the number of individuals affected. These details remain unclear.

More information regarding the incident, such as specific data types compromised or the full scope of affected individuals, may emerge as the company's investigation progresses.

Company Response Timeline

Breach Occurred

Aug 31, 2026

Company Discovered

Aug 31, 2026

Regulator Notified

Unknown

Consumers Notified

Unknown

0 days to discover

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

Were you in the McKesson Corporation breach? Check your email

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Check Your Risk Level

Answer a few questions to understand how this breach might affect you

Do you use McKesson Corporation?

Yes

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

Check whether this address shows up in other known breaches. Free, no account.

Get your info off data-broker sites

Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

See how Data Shield works