Chess.com (2026) - 4,653,212 breached accounts

By Have I Been Pwned1 min readPublished 13 September 2026

https://haveibeenpwned.com/Breach/Chess2026

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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...

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