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Chess.com (2026) Data Breach

Verified Breach
Aug 2, 2026 Breach Date
4,653,212 Accounts Affected
4 Data Types Exposed
Sep 13, 2026 Added to HIBP
About This Breach
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.
Compromised Data Types
Email addresses Geographic locations Names Usernames
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