Regexp Security Cheatsheet
A repository that catalogs security vulnerabilities found in regular expressions commonly implemented in Web Application Firewalls (WAFs). The resource provides detailed documentation of bypass techniques and examples that demonstrate how attackers can circumvent regex-based security controls. The cheatsheet focuses on high-severity issues and includes practical examples of regex patterns that can be exploited. It serves as a reference for security professionals to understand common weaknesses in regex implementations used for input validation and filtering. The repository includes SAST (Static Application Security Testing) tools designed to identify vulnerabilities in custom regular expressions. These tools help developers and security teams analyze their regex patterns for potential security flaws before deployment. Originally presented at BlackHat USA 2016, the resource has been maintained and updated to reflect current bypass techniques and vulnerability patterns. It provides both offensive and defensive perspectives on regex security, making it valuable for penetration testers, security researchers, and developers working on WAF implementations.
FEATURES
EXPLORE BY TAGS
SIMILAR TOOLS
A deliberately vulnerable Java web application designed for educational purposes to teach web application security concepts and common vulnerabilities.
A PHP port of Rack::Honeypot, a spam trap that detects and blocks spambots
Bearer CLI is a static application security testing tool that scans source code across multiple programming languages to identify and prioritize OWASP Top 10 and CWE Top 25 security vulnerabilities through data flow analysis.
Search engine for open-source Git repositories with advanced features like case sensitivity and regular expressions.
A Java API for searching and downloading Android applications from Google Play with additional check-in features for generating ANDROID-ID.
A source code search engine for searching alphanumeric snippets, signatures, or keywords in web page HTML, JS, and CSS code.
A brute-force protection middleware for express routes that rate-limits incoming requests.
SearchCode is an extensive code search engine that indexes 75 billion lines of code from millions of projects to help developers find coding examples and libraries.
A comprehensive toolkit for web application security testing, offering a range of products and solutions for identifying vulnerabilities and improving security posture.
PINNED
A cybersecurity platform that offers vulnerability scanning, Windows Defender and 3rd party AV management, and MFA compliance reporting, among other features.
Proton Pass is a cross-platform password manager that provides encrypted storage, password generation, and security monitoring features with integrated 2FA and dark web monitoring capabilities.
NordVPN is a commercial VPN service that encrypts internet connections and hides IP addresses through a global network of servers, featuring integrated threat protection and multi-device support.
Fractional CISO service that helps B2B companies implement security leadership to win enterprise deals, achieve compliance, and develop strategic security programs.
Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.
Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.
DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.