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Breach occurred 2018-09-11What happened
In September 2018, a collection of almost 42 million email address and plain text password pairs was uploaded to the anonymous file sharing service kayo.moe. The operator of the service contacted HIBP to report the data which, upon further investigation, turned out to be a large credential stuffing list. For more information, read about The 42M Record kayo.moe Credential Stuffing Data.
Data exposed
Frequently asked questions
The Kayo.moe Credential Stuffing List data breach occurred on September 11, 2018. It was added to Have I Been Pwned's breach catalog on September 13, 2018.
41,826,763 accounts were affected by the Kayo.moe Credential Stuffing List data breach, according to Have I Been Pwned's records.
The Kayo.moe Credential Stuffing List breach exposed the following data types: Email addresses, Passwords.
Have I Been Pwned has not independently verified the Kayo.moe Credential Stuffing List breach. Unverified breaches can still be genuine — verification just means HIBP hasn't been able to confirm the data's authenticity directly, often because the source is a smaller or less-publicized incident.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Kayo.moe Credential Stuffing List 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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