Frontend Security
Authentication
JWT Tokens
- Implementation: JWT tokens provided by Supabase
- Transport: Passed via
Authorization header in GraphQL requests
- Context: The user’s session is added to the GraphQL context on the server, making it available to all resolvers for authorization checks
Session Management
- Tokens are stored securely in the Apollo Client context
- Automatic token refresh handled by Supabase client
- Logout clears all client-side authentication state
API Security
Resolver-level Authorization
- Permissions are checked inside each resolver before fetching data
- User context is validated for every GraphQL operation
- Role-based access control enforced at the data layer
Query Security
- Query Depth/Cost Analysis: Implement limits to prevent malicious or expensive queries
- Rate Limiting: Prevent abuse through request throttling
- Input Validation: Use GraphQL’s type system for basic validation, with additional checks in resolvers
Data Protection
- Field-level Security: Sensitive fields are filtered based on user permissions
- Organization Isolation: Users can only access data from their own organization
- Audit Logging: All mutations are logged with user context
Client-Side Security
- All user inputs are validated both client-side and server-side
- XSS protection through proper React rendering practices
- File upload validation for type and size limits
State Management Security
- Sensitive data is not stored in local storage
- Apollo Client cache is cleared on logout
- Real-time subscriptions are authenticated per connection
Security Best Practices
Development Guidelines
- Never log sensitive data in console or debug outputs
- Use HTTPS for all API communications
- Implement proper error handling that doesn’t leak system information
- Regular security audits of dependencies
Deployment Security
- Content Security Policy (CSP) headers
- Secure cookie configuration
- CORS properly configured for production domains
- Regular security updates for all dependencies