CarMax data breach: 431K accounts exposed
Severity: medium · Patch status: no-fix-needed · Since 2026-02-20
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. Exposed data: email addresses, names, phone numbers, physical addresses. The breach dates from Jan 24, 2026; Have I Been Pwned loaded it on Feb 20, 2026.
What to do
- If you had a CarMax account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
All live incidents on Threat Watch