Open-source alternatives to Flan

The Snyk CLI is a command-line security scanner that detects known vulnerabilities across open-source dependencies, proprietary application code, container images, and infrastructure-as-code configuration files. It also serves as a platform management tool, allowing users to configure organizations, users, SSO, and reporting from the terminal rather than the web dashboard. The CLI integrates directly into development workflows, enabling scanning within IDEs, build pipelines, and version control systems. It implements static analysis with interfile data flow analysis to find complex security f

afrog is an HTTP vulnerability scanner and web vulnerability management system that identifies security flaws and known CVEs using a YAML-based rule engine. It functions as a payload generator and scanner, comparing server responses against detection rules to find unauthorized access points. The project provides a framework for out-of-band security testing, detecting blind vulnerabilities by triggering and verifying external DNS or HTTP callbacks. Beyond web traffic, it includes a protocol fuzzer capable of executing multi-step read and write sequences over raw TCP and SSL sockets to identify

Arachni is a dynamic application security testing vulnerability scanner and web application security tool. It functions as a distributed web audit framework that performs active and passive audits to identify security flaws such as SQL injection and cross-site scripting. The project features a JavaScript-aware web crawler that executes scripts and monitors DOM changes to analyze modern dynamic web applications. It utilizes server platform fingerprinting to target compatible security payloads and provides a grid-based system to distribute scanning workloads across multiple nodes. The tool cov

reconftw is an attack surface management framework and reconnaissance workflow orchestrator designed to automate the discovery, mapping, and monitoring of external digital assets. It operates as a modular tool-chain pipeline that coordinates a sequence of security tools to perform intelligence gathering and vulnerability scanning. The project distinguishes itself through a cloud-native deployment model that parallelizes scanning workloads across a fleet of remote VPS instances to bypass local resource constraints. It utilizes container-based environment isolation to ensure consistent executio

Sn1per is a vulnerability management platform and penetration testing orchestrator designed to automate reconnaissance, vulnerability scanning, and exploit verification. It functions as a dockerized security toolkit that coordinates multiple tools into a unified automated pipeline to identify security flaws across network and web assets. The platform features an attack surface manager for discovering internet-facing assets through OSINT, DNS enumeration, and certificate transparency. It distinguishes itself with an AI-powered security analyzer that uses large language models to summarize scan

kscan is a network security scanner and service fingerprinter used to discover active hosts and open ports. It functions as a network protocol analyzer and internal network mapper to identify reachable gateways and analyze the network surface area of target environments. The tool integrates external asset discovery by retrieving target hosts through external intelligence services and verifying their availability. It also operates as a credential brute force tool, testing authentication strength across multiple protocols using automated username and password dictionaries. The project covers n

Exphub is a CVE exploit script library and enterprise software vulnerability suite designed to verify and exploit known security flaws in server environments such as WebLogic, Struts2, Tomcat, and JBoss. It functions as a remote code execution toolkit and a web shell deployment framework for triggering unauthorized command execution and establishing persistent access on remote systems. The project includes specialized utilities for internal network reconnaissance, specifically using server-side request forgery to scan for open ports and services. It further provides mechanisms for bypassing a

This is a hands-on lab environment for learning network penetration testing techniques, centered on setting up and attacking a vulnerable Active Directory network. The project provides a structured framework for practicing the full attack chain, from initial reconnaissance and scanning through exploitation, privilege escalation, lateral movement, and credential theft, all within isolated virtual machine labs. The lab environment is designed to simulate real-world attack scenarios, including the ability to compile and execute exploit code directly against targets without relying on Metasploit.

This project is a comprehensive command-line reference and toolkit designed for Linux system administration and network security assessment. It provides a collection of technical snippets and operational guides focused on managing remote environments, orchestrating shell sessions, and executing administrative tasks through native terminal utilities. The repository distinguishes itself by offering specialized techniques for stealthy operations and infrastructure manipulation. It covers methods for establishing encrypted tunnels to bypass firewalls, obfuscating process identities and command hi

Faraday is a vulnerability management platform and security tool aggregator designed to centralize security findings from multiple scanners into a single dashboard. It utilizes a relational security database to catalog hosts, services, and security flaws, enabling users to track remediation and analyze organizational risk. The platform distinguishes itself through a plugin-based system that normalizes diverse security tool outputs into a unified data model. It supports deep integration with a wide array of scanners and CLI tools, intercepting shell command output or parsing report files to ag

ScoutSuite is a multi-cloud security audit and configuration tool designed to identify security risks and misconfigurations across cloud environments. It functions as a security posture manager and compliance auditor, gathering resource metadata from cloud APIs to evaluate infrastructure against security benchmarks. The tool provides auditing capabilities for AWS, Google Cloud, DigitalOcean, and Kubernetes clusters and control planes. It distinguishes itself by decoupling data collection from analysis, allowing users to cache cloud configurations locally for offline auditing and iterative rul

Prowler is a multi-cloud security scanner and security posture management tool. It automates security and compliance assessments across multiple cloud environments to identify misconfigurations and vulnerabilities. The project provides a multi-cloud security analysis engine that operates as an automated auditor, evaluating infrastructure against industry-standard regulatory frameworks and security benchmarks. It features a cloud security visualization dashboard that uses a graph database to map cloud inventory and visualize potential attack paths. Capabilities include automated cloud infrast

Pacu is an exploitation framework designed for auditing and testing the security of Amazon Web Services environments. It serves as a cloud penetration testing tool and resource enumerator used to identify misconfigurations, map attack surfaces, and execute privilege escalation paths. The framework provides specialized capabilities for post-exploitation and red team operations, including establishing persistence through identity and access management backdooring. It distinguishes itself with a plugin-based module system that allows for the development of custom tasks and the orchestration of A

testssl.sh is a suite of diagnostic tools and a network security auditor used to scan network ports for supported encryption protocols, ciphers, and vulnerabilities in TLS and SSL configurations. It functions as a security scanner that evaluates the cryptographic strength of a server by testing all available cipher suites. The tool analyzes server encryption strength and identifies security vulnerabilities or weak settings through TLS and SSL security auditing. It verifies that encryption is properly implemented on specific network ports and evaluates whether only strong and modern encryption

testssl.sh is a network security tool and SSL/TLS security scanner used to audit server configurations. It functions as a diagnostic utility that validates supported ciphers and protocols to identify cryptographic vulnerabilities and flaws in encrypted communication. The tool is available as both a command-line utility and a dockerized security scanner, allowing for execution in isolated environments without the need for local dependency installation. Its capabilities cover SSL configuration auditing and TLS server security analysis. The system exports scan results into structured reports a

SubsCheck-Win-GUI is a Windows desktop application for auditing proxy subscriptions and testing the performance of individual proxy nodes. It provides a graphical interface that lets users validate proxy subscription links by checking each node for connectivity and speed, and then measures latency and throughput to produce clear numerical metrics on connection quality. The application is built around a background worker model that keeps the desktop interface responsive during long-running validation and speed tests. It can parse proxy subscription URLs into individual node entries, run them t

PokeAPI is a read-only RESTful web interface and comprehensive knowledge base providing structured data about Pokémon species, moves, and game series entities. It functions as a containerized data service designed to deliver game statistics and entity details for programmatic use in applications. The service enables the retrieval of comprehensive Pokémon game data and the referencing of game entity metadata. Users can access this information through both REST and GraphQL interfaces to fetch specific data points and populate external application interfaces.

PrivescCheck is a PowerShell-based security auditing tool designed to scan Windows configurations for potential privilege escalation paths and local host vulnerabilities. It functions as a vulnerability assessment utility that analyzes system settings and registry configurations to identify weaknesses that could allow unauthorized administrative access. The tool automates internal security reconnaissance and post-exploitation data collection to gather environmental information. It serves as a security compliance reporter by exporting scan results into structured formats, including HTML, CSV,

Reaction is an event-driven, headless commerce platform designed to decouple backend business logic from the frontend presentation layer. It utilizes an API-first architecture with a GraphQL data layer to manage online sales and retail operations. The platform supports multi-tenant resource sharing, allowing multiple independent storefronts to be hosted and managed within a single installation. It features a plugin-based extension system that enables the integration of third-party services and custom business logic through composable workflows. The system covers core retail capabilities incl

PEASS-ng is a Linux privilege escalation scanner and post-exploitation enumeration tool. It identifies security vulnerabilities and misconfigurations on Linux systems that could lead to unauthorized elevated access. The tool functions as a security audit utility that discovers system weaknesses and sensitive information after initial access is gained. It scans operating systems to identify specific privilege escalation paths. Findings are converted into structured security audit reports. The tool supports exporting scan results into JSON, HTML, and PDF formats for formal analysis and documen

This project provides a collection of official base images for building and running .NET applications across various operating systems and hardware architectures. It includes standardized runtime environments, containerized development kits, and specialized images designed for isolated application execution. The collection is distinguished by its focus on image optimization and security hardening. It offers distroless images that remove shells and package managers to reduce the attack surface, as well as composite layering and ahead-of-time compilation to improve startup performance and lower

Bearer is a static analysis security testing tool and privacy compliance auditor. It identifies security vulnerabilities, hard-coded secrets, and privacy risks in source code through static analysis and data flow tracing. The tool distinguishes itself by tracking the movement of sensitive data through code to identify leaks and by mapping personal and health-related information flows to generate evidence for privacy impact assessments. It also provides differential scanning for pull requests and uses fingerprint-based suppression to exclude known false positives from reports. The platform co

Nuclei is a modular security scanning framework designed for automated vulnerability detection and infrastructure reconnaissance. It functions as a template-driven engine that executes security checks across diverse network protocols, allowing users to define custom detection logic to identify vulnerabilities, misconfigurations, and exposed assets. The platform distinguishes itself through its highly extensible architecture, which supports distributed scanning, headless browser automation for dynamic web content, and out-of-band interaction monitoring to detect blind vulnerabilities. It integ

Xray is a security assessment tool focused on web vulnerability scanning, attack surface mapping, and technology fingerprinting. It identifies common security flaws through automated scanning and semantic analysis, while verifying findings via a custom proof-of-concept execution engine. The system distinguishes itself with a containerized vulnerability testbed used to deploy pre-configured vulnerable applications. This environment allows for the simulation of specific vulnerabilities and edge-case scenarios to validate scanner accuracy and eliminate false positives. The platform covers a bro

Nikto is an open-source HTTP security auditing tool and web server vulnerability scanner. It functions as a reconnaissance engine designed to identify insecure server options, outdated software, and common vulnerabilities by analyzing HTTP responses. The project differentiates itself through capabilities for intrusion detection evasion and web server fingerprinting. It uses request-level encoding and timing spacers to bypass security filters and employs signature-based identification to determine specific server software versions and misconfigurations. The scanner covers broad capability are

SkillSpector is a security scanner designed to detect vulnerabilities and malicious patterns in AI agent plugins and extensions before they are installed. It functions as a runtime guardrail that calculates numeric risk scores and assigns severity labels to provide installation recommendations or block risky external extensions. The project distinguishes itself by using language models to perform semantic code analysis, evaluating code intent and context to reduce false positives. It also employs fingerprint-based issue suppression to track and ignore previously accepted risks across repeated

Dalfox is an automated web application security tool specifically designed for discovering and verifying cross-site scripting vulnerabilities. It functions as an XSS vulnerability scanner that analyzes HTTP parameters and DOM structures to identify reflected, stored, and blind injection points. The project distinguishes itself by providing a Model Context Protocol server and a REST API, allowing artificial intelligence agents and remote interfaces to trigger and manage security scans programmatically. It utilizes a payload mutation engine and fingerprinting strategies to execute WAF evasion t