What just happened? Researchers have discovered a database composed of
stolen user credentials and personally identifiable information (PII) so
large that it's been dubbed the mother of all breaches (MOAB). The dataset
contains no fewer than 26 billion records, making up 12TB of data from
sites including Twitter/X, LinkedIn, Weibo, Tencent, and more.

Cybersecurity researcher Bob Diachenko, who has uncovered many big data
leaks over the years, and the CyberNews team discovered the exposed
records.

As is the case with similar databases, most of the data in MOAB has been
gathered together from previous leaks over the years. But the sheer number
of records it contains suggests there will be new information that has
never before appeared online.

The database, containing 26 billion records across 3,800 folders, each
corresponding to a separate data breach, is likely the largest-ever
compilation of multiple breaches.

https://www.techspot.com/news/101623-massive-leak-exposes-26-billion-
records-mother-all.html