, and I share practical code and testing scripts on my [GitHub profile](https://github.com/aw-junaid/). Feel free to explore both if you want to go further with hands-on examples.](https://i0.wp.com/awjunaid.com/wp-content/uploads/2026/08/API-Rate-Limiting-Explained-How-Lack-of-Resource-Controls-Leads-to-DoS-Attacks-and-Server-Overload.webp?resize=110%2C110&ssl=1)
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What Is the Concept of a State-Value Function in Reinforcement Learning?
When I first started learning reinforcement learning (RL), one idea kept showing up…
How Is Q-Learning Used in Reinforcement Learning?
If you’ve spent any time reading about reinforcement learning, you’ve probably…
What Is the Concept of Exploration vs. Exploitation in Reinforcement Learning?
Imagine you just moved to a new city and you’re looking for the best coffee shop…
How Do You Handle Imbalanced Datasets in Deep Learning?
Every time I’ve worked on a fraud detection, medical diagnosis, or rare-event…
What Is the Difference Between a Pre-Trained Model and a Fine-Tuned Model in NLP?
Almost every modern NLP application you interact with today — chatbots, search engines,…
What Is a Word Embedding in NLP and Why Is It Important?
One of the first hurdles anyone runs into when working with natural language processing is a…
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Comprehensive Regex Cheatsheet: Master Regular Expressions in Python
I still remember the first time a regular expression broke my code at 2 AM. I was trying to validate an email…
Ultimate Linux Commands Cheat Sheet: Essential Terminal Commands for Power Users
I’ve spent years bouncing between servers, VMs, and my own laptop, and if there’s one skill that has…
Ultimate Dynamic Host Configuration Protocol (DHCP) Cheat Sheet: Commands and Configuration
The first time I had to troubleshoot a DHCP outage, it was on a Friday afternoon, half the office had no…
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, and I share practical code and testing scripts on my [GitHub profile](https://github.com/aw-junaid/). Feel free to explore both if you want to go further with hands-on examples.](https://i0.wp.com/awjunaid.com/wp-content/uploads/2026/08/API-Rate-Limiting-Explained-How-Lack-of-Resource-Controls-Leads-to-DoS-Attacks-and-Server-Overload.webp?resize=380%2C250&ssl=1)
API Rate Limiting Explained: How Lack of Resource Controls Leads to DoS Attacks and Server Overload
I want to talk about something that sounds boring on the surface but is one of the easiest ways to take down an entire API: lack of…
Broken Function Level Authorization (BFLA) in APIs: The Complete Guide to Detection and Prevention
Let me tell you about one of the sneakiest API vulnerabilities out there: Broken Function Level Authorization, or BFLA. This is…
Mass Assignment Vulnerabilities in APIs: How Attackers Exploit Auto-Binding and How to Stop Them
I want to explain one of the quietest but most dangerous API bugs out there: Mass Assignment. It’s listed in the OWASP API…
API Security Misconfigurations: A Complete Guide to Finding and Fixing Hidden Risks
I’ve noticed something over the years of looking at APIs: most breaches don’t come from some genius zero-day exploit.…
API Injection Attacks Explained: SQL, NoSQL, Command, and Code Injection Prevention Guide
Injection attacks are some of the oldest tricks in the book — and yet, decades later, they are still one of the most common ways…
Improper API Assets Management: Why Shadow and Zombie APIs Are a Silent Threat
Here’s a question I like to ask teams I work with: “Can you list every single API endpoint your company currently has…
Business Logic Vulnerabilities in APIs: The Hidden Flaws Automated Scanners Miss
Out of every vulnerability category I’ve talked about, this one is my favorite to explain, because it’s the category…
Rate Limit Testing in API Security: A Complete Guide to Finding and Fixing Rate Limiting Flaws
When I first started digging into API security, rate limiting was one of those things I underestimated. It sounds simple on paper —…
Security Testing Cloud APIs: My Complete Approach to Testing AWS, Azure, and GCP-Based APIs
Cloud APIs are a different beast compared to traditional on-premise APIs. When I test an API that’s hosted on AWS, Azure, or…
GraphQL Security Testing: How I Find Vulnerabilities in GraphQL APIs
GraphQL changed the way I think about API testing. With REST, I’m usually mapping out dozens of separate endpoints. With…
JSON Web Tokens (JWT) Security: Everything I Check When Testing JWT-Based APIs
JSON Web Tokens are everywhere in modern API authentication, and that’s exactly why I spend so much time testing them. A JWT…
Information Disclosure in APIs: How I Find Data Leaks Before Attackers Do
Information disclosure is one of the quietest categories of API vulnerabilities, and that’s exactly what makes it dangerous.…
Broken Object Level Authorization (BOLA): My Step-by-Step Testing Guide for API’s #1 Vulnerability
If I had to pick the single most common and most damaging API vulnerability I come across, it would be Broken Object Level…
Broken User Authentication in APIs: My Full Testing Checklist
Authentication is the front door of any API, and Broken User Authentication is what happens when that door doesn’t lock…