Skip to content
Back to Blog
critical severity January 07, 2019 · 1 min read

Collection #1 Data Breach (2019)

If you are a customer of Collection #1, here’s what’s now in circulation.

In January 2019, a large collection of credential stuffing lists (combinations of email addresses and passwords used to hijack accounts on other services) was discovered being distributed on a popular hacking forum. The data contained almost 2.7 billion records including 773 million unique email addresses alongside passwords those addresses had used on other breached services. Full details on the incident and how to search the breached passwords are provided in the blog post The 773 Million Record "Collection #1" Data Breach.

Collection #1 Data Breach (2019)

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Were you a Collection #1 customer?
Collection #1 is one listing. Your email is probably in others.
772.9M accounts were exposed here. Check whether yours is one — and find every other leak tied to the same address, in about 15 seconds. No account, no card.

By running your scan you agree to the Terms and Conditions and the Privacy Policy, and to GalaxyWarden emailing you the results of this scan.

Report details & sourcing

Severity Critical
Disclosed January 07, 2019
Last reviewed July 22, 2026
Affected 772.9M
Data exposed Email addressesPasswords
By GalaxyWarden Threat Research · Editorial & sourcing standards
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
Sources: Have I Been Pwned
Share this Post on X Reddit Email

Related breaches

critical September 01, 2019

Zynga — 173 Million Words With Friends Accounts (2019)

The maker of Words With Friends lost 173 million accounts with salted SHA-1 passwords and, unusually…
high May 24, 2019

Canva — 137 Million Accounts, and Why "Passwords Exposed" Overstates It (2019)

Canva hashed with bcrypt, and many users had no password at all because they signed in with Google o…
high February 25, 2019

Verifications.io — 763 Million Email Records Left on an Open Database (2019)

An email-validation firm most people had never heard of left 763 million records in a MongoDB instan…