Was your data in the Chess.com (2026) breach?
Check whether your email address was in it
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Chess.com (2026) (chess.com) suffered a data breach in 2026 that exposed around 4,653,212 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.
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.
Breach record from Have I Been Pwned, CC BY 4.0. Risk analysis by Nullivo.
What was exposed, and why it matters
Not all breaches carry the same risk — what matters is which fields leaked. Here is what the Chess.com (2026) breach exposed and what each item actually enables:
Also listed in this breach: Email addresses, Geographic locations, Names, Usernames.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Location data
Review location sharing on the accounts you still hold with this service. - Names and usernames
Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts. - Email addresses
Treat any message referencing this service with suspicion, and never act on links in unexpected emails. - Confirm you were actually in it
Run a free scan before you spend time on the steps above.
How urgent is this now?
This breach is recent, so the data is actively traded and the risk is at its highest right now.
Remember: a breach can’t be “un-leaked” — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can’t, and remove what has been republished.
Frequently asked questions
What data was exposed in the Chess.com (2026) breach?
The Chess.com (2026) breach exposed location data, names and usernames, email addresses. Reveals where you live, work or travel, which supports both targeted scams and physical-safety risks.
How many people were affected by the Chess.com (2026) breach?
Around 4,653,212 accounts were exposed, making it a large breach.
What should I do if I had a Chess.com (2026) account?
Review location sharing on the accounts you still hold with this service. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.
Breaches that exposed similar data
If the Chess.com (2026) breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.