A security/data breach is the intentional or unintentional security incident in which information was accessed without authorization. Release of secure or private/confidential information to public can hurt businesses and consumers in a many of ways.
Other reference: security compromise, data leak, information disclosure, information leakage, data spill.
List of all known breaches.
In June 2019, the library of Vienna (Wiener Büchereien) suffered a data breach. The compromised data included 224k unique email addresses, names, physical addresses, phone numbers and dates of birth. The breached data was subsequently posted to Twitter by the alleged perpetrator of the breach.
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.
