Every public data breach

44 disclosed this week · 26,355 on record

Disqus

Disclosed Oct 6, 201717,551,044 accountsUnverified

In October 2017, the blog commenting service Disqus announced they'd suffered a data breach . The breach dated back to July 2012 but wasn't identified until years later when the data finally surfaced. The breach contained over 17.5 million unique email addresses and usernames. Users who created logins on Disqus had salted SHA1 hashes of passwords whilst users who logged in via social providers only had references to those accounts.

What is known

People affected17,551,044 (accounts in the leaked data, per Have I Been Pwned)
DisclosedOct 6, 2017
HappenedJul 1, 2012
AttackNot stated
Data exposedEmailsPasswords
SectorTech
StatusUnverified: not yet confirmed by an official notice, a filing or the organization
Check your emailHave I Been Pwned

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.

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