perl-security

Enforce taint mode and parameterized DBI queries in Perl applications.

86|21|Updated Feb 9, 2026

Search Tags:#security #validation #web-security #secure-coding #dbi #perl #taint-mode

Ready to run

npx skills add https://github.com/Jamkris/everything-gemini-code --skill perl-security-jamkris

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: perl-security
Source: https://github.com/Jamkris/everything-gemini-code/tree/main/skills/perl-security
Command: npx skills add https://github.com/Jamkris/everything-gemini-code --skill perl-security-jamkris

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Perl applications often suffer from security vulnerabilities arising from unvalidated input, unsafe file operations, and insecure command execution. This Skill provides a structured set of best practices and patterns to enforce taint mode, strict input validation, safe process execution, and parameterized DBI queries to prevent common exploits.

Core Features & Use Cases

Taint-aware input handling and safe untainting patterns for Perl web and CLI apps.
Safe file operations, atomic writes, and guarded filesystem access.
SQL injection prevention via DBI placeholders and allowlists; secure web output encoding and CSRF considerations.

Quick Start

Start by enabling taint mode and integrating parameterized queries into your Perl project for secure data handling.

Frequently Asked Questions about perl-security

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

FAQPage Schema

How do I enable taint mode for secure Perl coding?▼

Taint mode for secure Perl coding is enabled by passing the -T flag in your script's shebang or interpreter invocation. It marks all external input as tainted, forcing you to explicitly validate and untaint data before using it in file operations, process execution, or database queries.

What's the best way to prevent SQL injection in Perl DBI queries?▼

Preventing SQL injection in Perl DBI queries is best achieved by using parameterized queries with placeholders. This approach separates SQL logic from data, ensuring user input is treated strictly as values rather than executable code.

Does this secure coding approach work with Mojolicious and Dancer2?▼

Yes, this secure coding approach applies to Mojolicious, Dancer2, Catalyst, and CGI scripts. It enforces strict input validation, safe file operations, and output encoding across these Perl web frameworks to prevent common security vulnerabilities.

How do I safely untaint user input in Perl web applications?▼

Safely untainting user input in Perl web applications requires strict input validation using regular expression capture groups. You must match the input against an expected safe pattern and extract only the captured data, ensuring untrusted data never reaches file or process operations unchecked.

Why does my Perl script fail after enabling taint mode?▼

Perl scripts often fail after enabling taint mode when unvalidated input is used in insecure operations like file access or system commands. Taint mode actively blocks these actions until you explicitly sanitize the data through strict validation patterns.

How do I perform safe file operations and atomic writes in Perl?▼

Safe file operations and atomic writes in Perl are performed by validating all file paths and writing to temporary files before renaming them. This guarded filesystem access prevents race conditions and path traversal vulnerabilities.