Disqus Data Breach (2012)
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.
Related breaches
Match Group (Tinder, Hinge, OkCupid) Data Breach — January 2026
ShinyHunters claimed responsibility for stealing over 10 million Match Group user records in early 2…
149 Million Credential Mega-Exposure — January 2026
Security researchers discovered a publicly exposed 96 GB database with 149 million unique logins cov…
Under Armour 72M Customer Email Dataset Resurfaces — January 2026
72 million user emails from a prior Under Armour breach were reposted publicly in January 2026, ampl…
A breach leaks your credentials. Then hackers chain those credentials to your address, family, phone, and employer using public broker sites. We’re the only tool built around that chain.
⚠ Were you in this breach?
Free email scanner. We check your address against 15.4B+ leaked records in 15 seconds — then show you the $19 cleanup that removes you from the broker sites aggregating leaked data.
Check my email — free →