This document outlines the security features and best practices implemented in the LangGraph + Mem0 integration demo. These security measures help protect against common vulnerabilities while maintaining functionality.

Protection Against: Injection attacks, XSS, malicious content Implementation:

• All user inputs are sanitized using HTML escaping
• Control characters and dangerous patterns are removed
• Maximum input length limits enforced (10,000 characters)
• Pattern matching to detect and remove potentially malicious scripts

Configuration:

max_input_length = 10000  # Maximum input length
dangerous_patterns = [
    r'<script[^>]*>[\s\S]*?</script>',
    r'javascript:',
    r'on\w+\s*=',
    r'eval\s*\(',
    r'exec\s*\(',
]

Protection Against: Configuration vulnerabilities, runtime failures Implementation:

• Mandatory validation of all required environment variables
• Format validation for URLs and numeric values
• Secure error messages that don't expose system details

Required Environment Variables:

ANTHROPIC_API_KEY=your_anthropic_api_key_here
ANTHROPIC_MODEL=claude-sonnet-4-0
OLLAMA_MODEL=nomic-embed-text:latest
OLLAMA_BASE_URL=http://localhost:11434
OLLAMA_EMBEDDING_DIMS=768
CHROMA_COLLECTION_NAME=test
CHROMA_DB_PATH=db

Protection Against: Information leakage, system enumeration Implementation:

• Generic error messages to users
• Detailed errors logged securely for administrators
• Exception type logging without sensitive details

Protection Against: Persistent malicious content, data corruption Implementation:

• Content sanitization before storage
• Length limits for memory content (5,000 characters)
• Validation of retrieved memory content

Protection Against: DoS attacks, resource abuse Implementation:

• Per-user rate limiting: 20 requests per minute, 100 per hour
• Automatic cleanup of old request records
• Graceful handling of rate limit violations

Configuration:

rate_limits = {
    'requests_per_minute': 20,
    'requests_per_hour': 100
}

Protection Against: Undetected attacks, compliance violations Implementation:

• Comprehensive security event logging
• Separate security log file (security.log)
• Structured logging with timestamps and severity levels

Log Events:

• Environment validation failures
• Input sanitization triggers
• Rate limit violations
• Memory validation failures
• Authentication/API errors

1. Environment Variables:

   • Store API keys in secure secret management systems
   • Use environment-specific configuration files
   • Implement key rotation policies

2. Rate Limiting:

   • Adjust limits based on expected usage patterns
   • Consider implementing different limits for different user tiers
   • Monitor and alert on unusual traffic patterns

3. Logging:

   • Configure log rotation to prevent disk space issues
   • Send security logs to centralized monitoring systems
   • Set up alerts for critical security events

4. Input Validation:

   • Review and update dangerous patterns regularly
   • Consider implementing content scanning for specific use cases
   • Adjust length limits based on application requirements

1. Network Security:

   • Use HTTPS for all external API communications
   • Implement network firewalls and access controls
   • Consider VPN or private network access for Ollama

2. Database Security:

   • Encrypt ChromaDB data at rest
   • Implement backup encryption
   • Regular security updates for database dependencies

3. Authentication and Authorization:

   • Implement proper user authentication in production
   • Use unique, non-predictable user IDs
   • Consider multi-factor authentication for admin access

4. Dependency Management:

   • Regularly update dependencies for security patches
   • Use dependency scanning tools
   • Pin dependency versions in production

1. Rate Limiting Events: Track frequency and patterns
2. Input Sanitization Triggers: Monitor for attack attempts
3. API Error Rates: Detect potential abuse or system issues
4. Memory Validation Failures: Watch for data corruption attempts

• Multiple rate limit violations from single user: Immediate alert
• High frequency of input sanitization events: Investigation required
• Environment validation failures: Critical alert
• Unusual error patterns: Monitoring alert

1. Critical: Environment compromise, data exfiltration attempts
2. High: Repeated attack patterns, rate limit abuse
3. Medium: Input sanitization triggers, validation failures
4. Low: Normal security events, routine monitoring

1. Immediate: Block/rate limit offending users
2. Short-term: Review logs, assess impact
3. Long-term: Update security measures, improve monitoring

1. Input Validation: Test with malicious payloads
2. Rate Limiting: Verify limits are enforced correctly
3. Error Handling: Ensure no information leakage
4. Environment Security: Test with missing/invalid configurations

• Input fuzzing tools for validation testing
• Load testing tools for rate limit verification
• Static analysis tools for code security review
• Dependency vulnerability scanners

• Memory content is stored locally in ChromaDB
• No data transmission to unauthorized third parties
• User data isolation through user_id segregation

• Conversation data is persisted locally
• No external data sharing beyond configured APIs
• User control over data through user_id management

This security implementation should be reviewed and updated regularly:

• Monthly review of security logs and metrics
• Quarterly assessment of security measures effectiveness
• Annual security architecture review
• Immediate updates for critical vulnerabilities

For security-related questions or to report vulnerabilities, please review the project's contribution guidelines and issue reporting process.