Securing Serverless Functions

When to Use

• When deploying Lambda functions or Azure Functions with access to sensitive data or cloud APIs
• When auditing existing serverless workloads for overly permissive IAM roles
• When integrating serverless functions into a DevSecOps pipeline with automated security scanning
• When hardcoded secrets or vulnerable dependencies are discovered in function code
• When establishing runtime monitoring for serverless workloads to detect injection or credential theft

Do not use for container-based compute security (see securing-kubernetes-on-cloud), for API Gateway configuration (see implementing-cloud-waf-rules), or for serverless architecture design decisions.

Prerequisites

• AWS Lambda, Azure Functions, or GCP Cloud Functions with deployment access
• CI/CD pipeline with dependency scanning tools (npm audit, Snyk, Dependabot)
• AWS Secrets Manager, Azure Key Vault, or HashiCorp Vault for secrets management
• CloudWatch, Application Insights, or Cloud Logging for function monitoring