API Security Hub
This topic hub is meant for teams tightening external interfaces and internal service APIs, especially where auth, inventory, and business logic are the main weak points.
Guides
18
Latest Update
May 8, 2026
Primary Intent
Curated guides on OWASP API risks, API authentication, discovery, authorization, and abuse-resistant API design.
Shadow APIs and Zombie APIs: API Discovery, Inventory, and Hidden Attack Surface Security
Learn how to find shadow APIs, track zombie APIs, build an API inventory, and reduce hidden API attack surface risk with practical API discovery and decommissioning strategies.
OWASP API Security Top 10 Explained: BOLA, Broken Auth, SSRF and Real Attack Examples
A practical OWASP API Security Top 10 guide covering BOLA, broken authentication, excessive data exposure, SSRF, rate limiting, and real API attack examples with secure fix patterns.
API Authentication: JWT vs Session vs OAuth 2.0 Security Comparison
Compare JWT, server-side sessions, and OAuth 2.0 for API authentication, including security trade-offs, cookie vs token risks, and when each approach is the right fit.
API Penetration Testing Checklist: How to Test Auth, BOLA, Rate Limits, and Business Logic
A hands-on API penetration testing guide mapped to modern API risks. Covers inventory, authentication, authorization, object-level checks, mass assignment, rate limiting, GraphQL exposure, and reporting practices with concrete abuse examples.
Self-Hosted LLM Security: Hardening vLLM, TGI, Ollama, and Inference APIs
Self-hosting an LLM gives you more control, but it also moves model, runtime, and network risk onto your team. This guide covers the hardening steps that matter for inference servers, private model pulls, prompt logs, and exposed GPU infrastructure.
LLM Gateway Security: Model Routing, Budget Controls, and Abuse Detection
An LLM gateway is not just a cost-control layer. It is the place where authentication, model policy, rate limiting, prompt controls, and provider failover need to come together. Learn how to design gateway security that does more than forward requests.
CORS Misconfiguration: Exploitation, Examples, and Prevention Guide
Most CORS bugs start as a quick frontend fix, then quietly turn the browser into an attacker-controlled proxy. This article breaks down the mistakes that actually show up in production and how to tighten them without breaking the app.
IDOR Hunting Guide: 10 Patterns, Real Payloads & Testing Techniques (2026)
Complete guide to finding Insecure Direct Object Reference (IDOR) vulnerabilities. Covers 10 IDOR patterns with real exploitation payloads, bypass techniques for UUID-based systems, and a systematic testing methodology used by professional pen testers.
Rate Limiting APIs: The Complete Node.js & Express Implementation Guide
Token buckets, sliding windows, Redis-backed limiters, and Cloudflare rules — every rate limiting strategy explained with production-ready code.
7 Security Mistakes Every Express.js App Makes in Production
From missing Helmet.js to unsafe deserialization — the most common security mistakes we find in Express.js applications during code reviews, with production-ready fixes.
API Authentication Bypass: 6 Techniques Attackers Use (And How to Stop Them)
From JWT algorithm confusion to OAuth misconfiguration — the most common API authentication bypass techniques we find in penetration tests, with real code examples and fixes.
JWT Security: Vulnerabilities, Best Practices & Implementation Guide
Comprehensive JWT security guide covering token anatomy, common vulnerabilities, RS256 vs HS256, refresh tokens, and secure implementation patterns.
Securing Generative AI APIs: MCP Security & Shadow AI Risks in 2026
Model Context Protocol (MCP) is the emerging standard for connecting AI to tools and data. But MCP servers, shadow AI usage, and AI supply chain attacks introduce critical risks. Learn how to secure generative AI APIs.
API Security Trends 2026: Protecting REST, GraphQL & gRPC in an AI-Driven World
APIs now account for 83% of web traffic. This guide covers the most critical API security trends for 2026 — AI-generated API abuse, GraphQL-specific attacks, gRPC security, API gateways, and runtime protection strategies.
API Security for AI Agents: Securing MCP, Function Calling & Tool Use
AI agents are the new API consumers. This guide covers securing APIs against AI-driven abuse — MCP server hardening, function calling guardrails, tool delegation authorization, and protecting sensitive endpoints from autonomous agents.
Business Logic Abuse in APIs: The Vulnerabilities Scanners Can't Find
Business logic vulnerabilities are invisible to automated scanners. From coupon stacking to loyalty fraud to race conditions, this guide covers the most exploited business logic flaws in APIs with detection strategies and prevention patterns.
Secure API Design Patterns: A Developer's Guide
Learn the essential security patterns every API developer should implement, from authentication to rate limiting.
GraphQL Security Vulnerabilities: The Complete Guide for 2025
GraphQL APIs introduce unique attack vectors — introspection leaks, batching attacks, query depth bombs, and authorization bypasses. Here's how to secure your GraphQL endpoints.