security-express

Audit Express.js middleware, CORS, headers, and session handling for security gaps.

7|2|Updated Jan 18, 2026
One-click install
npx skills add https://github.com/jal-co/jalco-opencode --skill security-express-jal-co
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: security-express
Source: https://github.com/jal-co/jalco-opencode/tree/main/opencode/.config/opencode/skills/security-express
Command: npx skills add https://github.com/jal-co/jalco-opencode --skill security-express-jal-co

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Express.js security audits are needed to identify misconfigurations in middleware, CORS, headers, and session handling before deployment.

Core Features & Use Cases

  • Helmet.js checks and security headers enforcement
  • CORS configuration validation and safe defaults for origin, credentials, and allowlists
  • Body parser limits and safe request size controls
  • Middleware order and route protection analysis to ensure proper auth flow
  • Quick remediation guidelines for common Express security gaps

Quick Start

Run an Express.js project through the audit workflow to surface missing security headers, risky CORS settings, and non-strict session configurations.

Frequently Asked Questions about security-express

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I audit an Express.js app for security vulnerabilities?

To audit Express.js security, validate middleware, CORS, headers, and session handling against best practices. The audit checks helmet usage, body-parser limits, and authentication ordering to output concrete remediation steps.

How does helmet protect Express.js security headers?

Helmet protects Express.js security headers by setting HTTP response headers that mitigate common web vulnerabilities. The audit checks your helmet configuration to ensure these headers are properly enforced and configured against best practices.

What is the best way to configure CORS in Express.js?

Configuring CORS securely requires validating safe defaults for origin, credentials, and allowlists. The audit checks your CORS configuration against best practices to prevent unauthorized cross-origin access and provides remediation steps.

Why does middleware order affect Express.js authentication?

Middleware order affects Express.js authentication because security checks must execute before route handlers to enforce proper auth flow. The audit analyzes middleware ordering and route protection to ensure authentication is not bypassed.

Can I audit Express session handling for any codebase size?

Yes, you can audit Express session handling for any codebase size and structure. The audit validates configurations against best practices, focusing on session handling and authentication middleware to ensure non-strict configurations are remediated.

What are the limitations of body-parser limits in Express security?

Body-parser limits in Express security restrict request sizes to prevent denial-of-service attacks, but incorrect limits can block legitimate large payloads. The audit validates safe request size controls to balance security and functionality.