When using Lightning Container Components, here are the key security considerations:
1. **Use Static Resources**: Always load all scripts from static resources to ensure the security properties of the component can be analyzed and for better control and security.
2. **Avoid Dynamic Loading**: Do not dynamically load third-party JavaScript from external CDNs. Instead, include them in your static resources for better control and security.
3. **Sanitize User Data**: The framework does not automatically encode HTML, so sanitize all user-controlled data to prevent vulnerabilities like cross-site scripting (XSS).
4. **Enable LockerService**: For components using API version 40.0 or higher, enable LockerService to ensure component isolation and secure interactions.
5. **Validate API Callouts**: When triggering API callouts in Apex, validate user-provided endpoints and HTTP methods to prevent misuse.
6. **Protect Sensitive Information**: Avoid exposing sensitive data, such as API tokens or passwords, in URLs or query strings.
By following these practices, you can mitigate potential security risks and ensure secure implementation of Lightning Container Components.