What was exposed, when it happened, and which databases confirm it.
- accounts
- 4,653,212
- Breached
- August 3, 2026
- Last Update
- September 13, 2026
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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.
Compromised Info
- Email addresses
- Geographic locations
- Names
- Usernames
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the Chess2026 breach?
The Chess2026 breach exposed: Email addresses, Geographic locations, Names, and Usernames.
When did the Chess2026 breach happen?
The Chess2026 breach was disclosed on August 3, 2026 and affected 4,653,212 records.
Am I affected by the Chess2026 breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Chess2026 leak.