CarMax
MEDIUM RISKData breach — January 2026
In January 2026, data allegedly sourced from US automotive retailer CarMax was published online following a failed extortion attempt. The data included 431k unique email addresses along with names, phone numbers and physical addresses.
search Check if you were affected — freeData exposed in this breach
What happened in the CarMax data breach?
In January 2026, data allegedly sourced from US automotive retailer CarMax was published online following a failed extortion attempt. The data included 431k unique email addresses along with names, phone numbers and physical addresses.
The exposed data included 4 types of personal information. Learn more about what a data breach means for you.
Quick answer — was CarMax hacked?
Yes. CarMax was breached in January 2026. The breach exposed 431,371 records including email addresses, names, phone numbers. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the CarMax breach so dangerous?
The CarMax breach exposed 431,371 records — that is a large number of compromised accounts. The combination of email addresses, names, phone numbers makes this a medium-risk breach that should be addressed promptly.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the CarMax breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Physical addresses — combined with other data, used for identity theft and physical fraud
Is the CarMax breach still dangerous in 2026?
Yes. Stolen data from the CarMax breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2026 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your CarMax password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the CarMax breach
Approximately 431,371 user records were exposed in the CarMax breach in January 2026.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your CarMax password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full CarMax dataset and tell you instantly whether your email was exposed and what data was taken.
Change your CarMax password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the CarMax breach?
The CarMax data breach affected approximately 431,371 users who had accounts with the service. While not the largest breach on record, it still represents a significant number of compromised accounts in our database of 970+ known breaches.
If you ever created an account with CarMax or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the CarMax breach
Change your CarMax password immediately
Go to CarMax and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on CarMax and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
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