Madison Square Garden Sports data breach
9,796,738 accounts exposed in a breach on 5 June 2026.
At a glance
9,796,738
Accounts exposed
5 June 2026
Date of the breach
24 June 2026
Added to the list
What happened
In June 2026, the sports and entertainment company Madison Square Garden Sports was the target of a ShinyHunters "pay or leak" extortion campaign. The group later published the alleged data, which included almost 10M unique email addresses spanning staff and customers, along with extensive personal, employment and customer relationship information.
What was exposed
- Customer service records. This kind of data was included in the breach. Treat it as exposed and be careful with messages that use it.
- Email addresses. Email addresses were exposed. Expect more spam and phishing aimed at those addresses.
- Names. Names were exposed. Scammers use real names to make a message look personal.
- Phone numbers. Phone numbers were exposed. Expect scam calls and text messages, some of them pretending to be the organisation.
- Physical addresses. Home or postal addresses were exposed. They can be used to make a scam letter or a fake identity look real.
What to do now
It depends on what was exposed, so these steps follow the list above.
If your contact details were exposed
- Expect more spam, scam calls and phishing. Do not click links or open attachments in messages you did not expect.
- If a message mentions this breach, do not reply. Go to the organisation's own website or app instead of using a link in the message.
Whatever was exposed
- Check which other breaches include your own email address and phone number.
- Keep an eye on your accounts for a few months. Breached data is often used long after the breach.
- If you think someone is using your details, report it to the organisation and to your national cyber crime reporting service.
Check your own exposure
- Password leak check: find out whether a password has appeared in a breach. The password never leaves your browser.
- Free domain security scan: grade the email, DNS and website security of a domain you own.
Related breaches
Other breaches that exposed some of the same kinds of data.
Odido
In February 2026, Dutch telco Odido was the victim of a data breach and subsequent extortion attempt.
- Bank account numbers
- Customer service records
- Dates of birth
- Driver's licenses
- +7 more
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Gîtes de France
In May 2026, the French holiday rental network Gîtes de France suffered a data breach affecting some of its departmental branches.
- Booking details
- Email addresses
- Names
- Phone numbers
- +1 more
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Crunchbase
In January 2026, the private company intelligence platform Crunchbase was targeted in a ShinyHunters "pay or leak" extortion attempt.
- Email addresses
- Employers
- Job titles
- Names
- +3 more
Read what happened