OWASP Security Skill for Claude Code

A Claude Code skill providing the latest OWASP security best practices (2025-2026) for developers building secure applications.

Quick Install (One Line)

Add this skill to any project with a single command:

curl -sL https://raw.githubusercontent.com/agamm/claude-code-owasp/main/.claude/skills/owasp-security/SKILL.md -o .claude/skills/owasp-security/SKILL.md --create-dirs

Or install globally for all projects:

curl -sL https://raw.githubusercontent.com/agamm/claude-code-owasp/main/.claude/skills/owasp-security/SKILL.md -o ~/.claude/skills/owasp-security/SKILL.md --create-dirs

What's Included

Claude Code Skill

Location: .claude/skills/owasp-security/SKILL.md

• OWASP Top 10:2025 quick reference table
• Security code review checklists for input handling, auth, access control, data protection, and error handling
• Secure code patterns with unsafe/safe examples
• OWASP Agentic AI Security (2026) - ASI01-ASI10 risks for AI agent systems
• ASVS 5.0 key requirements by verification level
• Language-specific security quirks for 20+ languages with deep analysis guidance

Research Report

Location: OWASP-2025-2026-Report.md

Comprehensive documentation covering all OWASP 2025-2026 standards.

Usage

Once installed, Claude Code automatically activates this skill when you:

• Review code for security vulnerabilities
• Implement authentication or authorization
• Handle user input or external data
• Work with cryptography or password storage
• Design API endpoints
• Build AI agent systems

Example Prompts

"Review this code for security issues"
"Is this authentication implementation secure?"
"What are the security risks in this Python code?"
"Help me implement secure session management"
"Check this AI agent for OWASP agentic risks"

Covered Standards

Standard	Version	Focus
OWASP Top 10	2025	Web application vulnerabilities
OWASP ASVS	5.0.0	Security verification requirements
OWASP Agentic	2026	AI agent security risks

Language Coverage

Security quirks for 20+ languages including:

Web	Systems	Mobile	Scripting
JavaScript/TypeScript	C/C++	Swift	Python
PHP	Rust	Kotlin	Ruby
Java	Go	Dart	Perl
C#			Shell

Each language section includes common vulnerabilities, unsafe/safe code patterns, and key functions to watch for.

Alternative Installation

Clone Full Repository

git clone https://github.com/agamm/claude-code-owasp.git
cp -r claude-code-owasp/.claude/skills/owasp-security YOUR_PROJECT/.claude/skills/

Contributing

Contributions welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Submit a pull request

Sources

• OWASP Top 10:2025
• OWASP ASVS 5.0
• OWASP Top 10 for Agentic Applications 2026
• OWASP Cheat Sheet Series

License

MIT License - See LICENSE file for details.

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Keywords: OWASP, security, Claude Code, AI security, application security, ASVS, secure coding, vulnerability, injection, XSS, CSRF, authentication, authorization