Our mobile app relies heavily on REST APIs, and I’m concerned about "Broken Object Level Authorization" (BOLA). It seems like every major breach lately involves an API vulnerability. What are the most effective ways to automate API security testing in our CI/CD pipeline? Should we be using a dedicated Web Application Firewall (WAF) or focus more on code-level input validation?
3 answers
Are you using API Keys or JWT (JSON Web Tokens) for your authentication, and how are you handling the secure rotation of those credentials to prevent long-term leaks?
BOLA is the #1 threat because it’s a logic flaw, not just a technical bug. A WAF can catch basic injections, but it won't know if "User A" is allowed to see "User B’s" data record. You must implement strict authorization checks at the code level for every single request. For automation, integrate DAST (Dynamic Application Security Testing) tools into your pipeline that specifically crawl API endpoints. Use "Contract Testing" to ensure your API only accepts the exact data types you expect. Never rely on the client-side app to filter data; always assume the API request is coming from a malicious actor and validate everything on the server.
Rate limiting is a must. It prevents attackers from "Scraping" your entire database by making thousands of small requests to your API in a short period of time.
Spot on, Nancy. Rate limiting and throttling are your first line of defense against brute force attacks and automated data harvesting via your endpoints.
Richard, we use JWTs with a very short expiration time—usually only 15 minutes. We also implemented "Scopes" so that a token used for the mobile app cannot be used to access administrative functions. For rotation, we use a vault system that automatically generates new keys every 30 days. This significantly limits the "Blast Radius" if a key ever gets checked into a public GitHub repo by mistake. It’s a bit more complex for the developers, but the peace of mind regarding our API security is worth the extra effort in the long run.