Security Guides

Log4j Security Guide (2026)

Log4j is the most widely deployed Java logging library — and the source of Log4Shell, the defining supply-chain vulnerability of the decade. Here is how to run it safely in 2026.

Jul 5, 20266 min read

Java SQL Injection Prevention: Parameterized Queries and Beyond

SQL injection is decades old and still breaching Java apps. Here's how to prevent it with prepared statements, JPA binding, and safe dynamic queries.

GraphQL API Security: Introspection, Depth Limits, and Authorization

GraphQL's flexibility is its attack surface. Nested queries, introspection, and per-field authorization all fail differently than REST. Here's how to secure them.

Go Concurrency Security Pitfalls: When Data Races Become Vulnerabilities

A data race isn't just a flaky test — in the wrong place it's an auth bypass, a cross-request leak, or a denial of service. Here are the Go concurrency bugs that turn into security incidents.

Jul 5, 20267 min read

C# Cryptography Best Practices in .NET

The right way to do cryptography in C#: authenticated encryption with AesGcm, secure randomness, PBKDF2 password hashing, constant-time comparison, and the legacy APIs to stop using.

Auditing PHP Dependencies with composer audit

Composer ships a native security auditor. Learn to run composer audit against your composer.lock, catch abandoned packages, and extend it with continuous SCA.

Securing Express Applications: A Layered Playbook

Express gives you almost no security by default. This playbook layers the middleware, headers, rate limits, session hardening, and input validation that turn a bare Express app into a defensible one — with Express 5 in mind.

.NET Dependency Vulnerability Scanning: A Practical Guide

How to scan .NET dependencies for known vulnerabilities using dotnet list package, NuGet audit, and reachability-aware SCA, and how to wire it into CI so nothing ships with a known critical.

Preventing Command Injection in Python

Every time Python code shells out with user input, an attacker gets a vote on what the shell runs. The fix is almost always to stop using the shell at all.

How to Prevent Prototype Pollution in JavaScript

Prototype pollution turns a single crafted JSON key into process-wide corruption — and it has escalated to RCE in real Node.js apps. Here is how the attack works and four layers of defense that stop it.

Pillow (PIL) Security Guide (2026)

Pillow is the default image library for Python — and because it parses untrusted image bytes and once shipped an eval-based ImageMath, it has a long, real CVE history spanning arbitrary code execution and native buffer overflows.

Jul 4, 20266 min read