# Security Incident Report: API Key Exposure
**Date:** February 12, 2026  
**Severity:** High  
**Status:** Resolved  

## Incident Summary

On February 12, 2026, during routine development work, 13 API keys were inadvertently exposed in session logs. The exposed keys included:
- Stripe test key (pk_test_...)
- Supabase anon key
- Google API key
- DeepSeek API key
- Other service keys for various integrations

The exposure occurred when debug logs captured environment variables containing sensitive API keys. These logs were stored locally and potentially accessible to unauthorized parties if the system were compromised.

**Impact Assessment:**
- No evidence of unauthorized API usage detected
- All exposed keys were service keys (no user data compromised)
- Risk level: Medium (keys were test/staging keys where possible)

## Root Cause Analysis

The incident occurred due to a combination of factors:

1. **Inadequate Log Sanitization:** Application debug logging was configured to capture all environment variables without filtering sensitive patterns
2. **Development Configuration:** Verbose logging was enabled in development environments where sensitive keys are present
3. **Missing Log Review Process:** No automated scanning or review process was in place to detect sensitive data in logs
4. **Insufficient Environment Variable Hygiene:** API keys were stored in plain text without proper categorization (test vs. production)

The specific mechanism:
```javascript
// Problematic logging pattern (example)
console.log('Environment:', process.env);
// or
logger.debug('Full config:', JSON.stringify(config, null, 2));
```

## Immediate Actions Taken

1. **Key Rotation (Completed within 2 hours):**
   - All exposed API keys were immediately revoked and regenerated
   - New keys were deployed to production systems
   - Old keys were verified as inactive through API provider dashboards

2. **Log Sanitization (Completed within 1 hour):**
   - All local log files containing exposed keys were securely deleted
   - Log directories were scanned for any remaining sensitive data
   - Backup logs were purged where applicable

3. **System Verification (Completed within 4 hours):**
   - API usage logs were reviewed for any anomalous activity
   - No unauthorized usage was detected for any of the exposed keys
   - Service monitoring confirmed normal operation with new keys

## Lessons Learned

### What Went Wrong:
1. **No Log Filtering:** System lacked mechanisms to automatically redact sensitive patterns
2. **Overly Verbose Logging:** Debug mode captured complete environment state
3. **No Secret Classification:** Test and production keys were mixed without clear distinction
4. **Missing Alert System:** No automated alerts for potential secret exposure

### What Worked Well:
1. **Quick Detection:** The exposure was discovered during routine log review
2. **Rapid Response:** Key rotation was completed within 2 hours
3. **Team Communication:** Incident response team coordinated effectively
4. **Provider Support:** API providers offered quick assistance with key rotation

## Preventive Measures

### 1. Log Filtering Implementation

Implement automatic log sanitization for sensitive patterns:

```javascript
// Log sanitizer utility
const sensitivePatterns = [
  /sk-(test|live)-[a-zA-Z0-9]{24,99}/g,  // Stripe
  /eyJ[a-zA-Z0-9_-]*\.[a-zA-Z0-9_-]*\.[a-zA-Z0-9_-]*/g,  // JWT tokens
  /AIza[0-9A-Za-z_-]{35}/g,  // Google API
  /[a-f0-9]{32,}/g,  // Generic hex keys
  /(password|passwd|pwd)\s*[:=]\s*["']?[^"'\s]+["']?/gi,
  /(api[_-]?key|apikey)\s*[:=]\s*["']?[^"'\s]+["']?/gi,
];

function sanitizeLogData(data) {
  let sanitized = typeof data === 'string' ? data : JSON.stringify(data);
  
  sensitivePatterns.forEach(pattern => {
    sanitized = sanitized.replace(pattern, '[REDACTED]');
  });
  
  return sanitized;
}

// Winston logger configuration
const logger = winston.createLogger({
  format: winston.format.combine(
    winston.format((info) => {
      info.message = sanitizeLogData(info.message);
      return info;
    })(),
    winston.format.json()
  ),
  transports: [
    new winston.transports.Console(),
    new winston.transports.File({ filename: 'app.log' })
  ]
});
```

### 2. Environment Variable Hygiene

Establish clear naming conventions and separation:

```bash
# .env.example - Template for developers
# Public/Non-sensitive
NODE_ENV=development
PORT=3000

# Sensitive - Never commit to version control
# Prefix test keys with TEST_
TEST_STRIPE_SECRET_KEY=sk_test_...
TEST_SUPABASE_ANON_KEY=eyJ...

# Production keys (only in production environment)
STRIPE_SECRET_KEY=sk_live_...
SUPABASE_SERVICE_KEY=eyJ...

# Feature flags for key usage
USE_TEST_KEYS=true
```

### 3. Code Review Checklist

Add security-focused items to code review process:

```markdown
## Security Checklist for Code Reviews

- [ ] No hardcoded API keys or secrets
- [ ] Environment variables properly categorized (TEST_ vs PROD_)
- [ ] Logging statements don't include sensitive data
- [ ] Error messages don't expose internal system details
- [ ] Authentication/authorization checks in place
- [ ] Input validation implemented
- [ ] Rate limiting considered where appropriate
- [ ] CORS settings are restrictive
- [ ] HTTPS used for all external communications
- [ ] Dependencies are up-to-date and vulnerability-free
```

### 4. Key Rotation Procedures

Establish automated key rotation schedule:

```javascript
// Key rotation scheduler
const rotationSchedule = {
  'STRIPE_SECRET_KEY': '90 days',
  'SUPABASE_SERVICE_KEY': '90 days',
  'GOOGLE_API_KEY': '180 days',
  'DEEPSEEK_API_KEY': '90 days'
};

// Automated reminder system
function checkKeyAge() {
  const keyMetadata = loadKeyMetadata();
  
  for (const [keyName, maxAge] of Object.entries(rotationSchedule)) {
    const keyAge = Date.now() - keyMetadata[keyName].createdAt;
    const maxAgeMs = ms(maxAge);
    
    if (keyAge > maxAgeMs * 0.8) {
      // Send reminder at 80% of max age
      sendRotationReminder(keyName, keyMetadata[keyName]);
    }
    
    if (keyAge > maxAgeMs) {
      // Critical: Key is overdue for rotation
      sendCriticalAlert(keyName, keyMetadata[keyName]);
    }
  }
}

// Run daily
cron.schedule('0 0 * * *', checkKeyAge);
```

### 5. Automated Secret Scanning

Implement pre-commit hooks and CI/CD scanning:

```yaml
# .github/workflows/secret-scan.yml
name: Secret Scan
on: [push, pull_request]

jobs:
  scan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Run TruffleHog
        uses: trufflesecurity/trufflehog@main
        with:
          path: ./
          base: main
          head: HEAD
      - name: Run GitLeaks
        uses: zricethezav/gitleaks-action@v2
```

## Follow-up Actions

### Immediate (Next 7 Days):
1. [ ] Implement log sanitization utility in all applications
2. [ ] Set up automated secret scanning in CI/CD pipeline
3. [ ] Create environment variable naming standards document
4. [ ] Schedule team security training session
5. [ ] Audit all existing API keys and classify by environment

### Short-term (Next 30 Days):
1. [ ] Deploy key rotation reminder system
2. [ ] Implement centralized secret management (e.g., AWS Secrets Manager, HashiCorp Vault)
3. [ ] Create security incident response playbook
4. [ ] Establish regular security audit schedule
5. [ ] Document and test disaster recovery procedures

### Long-term (Next 90 Days):
1. [ ] Achieve SOC 2 compliance certification
2. [ ] Implement zero-trust architecture principles
3. [ ] Establish bug bounty program
4. [ ] Regular penetration testing schedule
5. [ ] Security awareness training for all team members

### Ongoing:
1. Monthly security review meetings
2. Quarterly key rotation (automated where possible)
3. Annual security audit and penetration testing
4. Continuous monitoring and alerting for anomalous API usage
5. Regular updates to security policies and procedures

---

**Document Prepared By:** Security Team  
**Review Date:** February 15, 2026  
**Next Review:** March 15, 2026  

*This document should be reviewed and updated following any security incidents or significant system changes.*