This page may contain stale information. Last updated: 2026-06-28
Definition
A data breach is a security incident where unauthorized parties gain access to sensitive, protected, or confidential data. Breaches can involve personal information, financial data, intellectual property, or trade secrets.
Common Causes
- Phishing Attacks: Deceiving employees to reveal credentials
- Software Vulnerabilities: Exploiting unpatched security flaws
- Insider Threats: Malicious or negligent employees
- Third-Party Compromises: Vendor or partner security failures
- Misconfigured Systems: Accidental exposure of data
2026 Notable Incident
MoneyForward GitHub Breach
- Date: May 1-3, 2026
- Affected: Corporate GitHub account
- Data Stolen:
- Source code repositories
- 370 records (MoneyForward Business Cards)
- Root Cause: Sensitive data inadvertently stored on GitHub
Response Framework
- Detection: Identify breach quickly
- Containment: Isolate affected systems
- Assessment: Determine scope and impact
- Notification: Inform affected parties (per GDPR, etc.)
- Remediation: Fix root causes
- Post-Incident: Review and improve