Stack Overflow confirms breach, but customer data said to be unaffected May 16, 2019 https://techcrunch.com/2019/05/16/stack-overflow-data-breach/ Stack Overflow blog entry: Security Update
After breach, Stack Overflow says some user data exposed May 17, 2019 https://techcrunch.com/2019/05/17/stack-overflow-user-data-exposed/ Update to Security Incident [May 17, 2019]