Is serverless architecture actually more secure than traditional VM-based deployments?

All answers to this question.

It's a trade-off. You lose the "server" to patch, which is great because you're no longer worried about OS-level exploits like Heartbleed. However, you gain a massive "permissions" headache. In serverless, each function needs its own specific IAM role. If you give a Lambda "FullS3Access" instead of access to just one specific bucket, you've created a huge hole. In 2024, we saw an increase in attacks targeting function logic and insecure third-party dependencies within the code itself. You aren't "more" secure; you are just securing a different layer of the stack—specifically the application and the data.

   Answered 2025-11-13 by Theresa Wagner

Are you planning to use a Web Application Firewall (WAF) in front of your API Gateway to filter out malicious payloads before they hit the functions?

   Answered 2025-11-15 by Keith Simmons

• A WAF is essential for any project exposed to the web. It helps mitigate common injection attacks that serverless functions are susceptible to. Additionally, you should be scanning your deployment packages for vulnerable libraries. Since serverless relies heavily on small, modular code, a single compromised npm or pip package can compromise your entire logic flow. Never assume the provider’s infrastructure security covers your application-level code vulnerabilities.

     Commented 2025-11-16 by Vincent Hayes

Keep your function execution times short. Setting a tight timeout is actually a security feature because it limits how much a malicious script can do if it gets triggered.

   Answered 2025-11-17 by Gary Sullivan

• Excellent advice. Short timeouts prevent "denial of wallet" attacks where an attacker tries to run up your bill by keeping functions active.

     Commented 2025-11-18 by Cheryl Boyd