• Google Issues Worldwide Gmail Data Breach Warning – Newsweek
• Why Google Is Really Warning 2.5 Billion Gmail Users to Stop Using Their Password

Except this widely reported story is not true, per Google:

• “Entirely false” – Google says there is no major security issue affecting Gmail
• Google denies reports that 2.5 billion Gmail users were impacted by security issue | Mashable
• Reports of Gmail security issue are inaccurate