Chess.com (2026) - 4,653,212 breached accounts
Date:
Sun, 13 Sep 2026 13:09:11 Z
Content:
In August 2026, millions of records allegedly sourced from Chess.com were posted online . The data contained 7.3M rows with 4.6M unique email
addresses, along with usernames, names, countries and data relating to users' Chess.com accounts. Analysis of the data suggested it had been obtained by scraping. When loaded into HIBP, 99% of the email addresses had already appeared in previous data breaches, further supporting the scraping theory. Read more about scrapes and data breaches.
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Link to news story:
https://haveibeenpwned.com/Breach/Chess2026
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