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Breach occurred 2026-08-03Verifiedchess.com
What happened
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.
Data exposed
Frequently asked questions
The Chess.com (2026) data breach occurred on August 3, 2026. It was added to Have I Been Pwned's breach catalog on September 13, 2026.
4,653,212 accounts were affected by the Chess.com (2026) data breach, according to Have I Been Pwned's records.
The Chess.com (2026) breach exposed the following data types: Email addresses, Geographic locations, Names, Usernames.
Yes. Have I Been Pwned has verified the Chess.com (2026) breach, meaning there's confirmed evidence the exposed data is genuine and tied to real accounts.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Chess.com (2026) breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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