Top 20 Open-Source Cybersecurity Tools for Team Protection

20 open-source cybersecurity tools to keep your team ready for anything

AIMap

AIMap is an open-source platform that identifies and evaluates exposed AI endpoints. Public-facing Ollama servers, MCP endpoints, and inference proxies have expanded across the internet in recent months, often lacking authentication mechanisms or rate restrictions. AIMap scans the internet at scale to locate these systems, perform fingerprinting, assess their exposure levels, and execute protocol-specific attack tests on authorized targets.

AgentGG

AgentGG is an open-source agentic SAST scanner. Static analysis tools have traditionally relied on matching source code against known malicious patterns, resulting in lengthy lists of potential issues for engineers to manually triage. AgentGG employs AI agents to analyze code, follow import dependencies, traverse call graphs, and validate findings before generating reports. The project is distributed under the Apache 2.0 license.

Agent Beacon

Agent Beacon is an open-source telemetry layer for AI agents. AI coding agents such as Claude Code, Codex CLI, Cursor, and Claude Cowork operate on developer machines, CI pipelines, and cloud environments, performing tasks like file editing, command execution, and external tool integration. Beacon, developed by Asymptote Labs, provides telemetry configuration for these environments and records standardized activity logs across local, CI, and cloud agent platforms.

Agent Threat Rules

Agent Threat Rules is an open detection format for AI agent security threats. AI agents function within coding assistants, MCP servers, and multi-agent frameworks, but their access capabilities create risks such as prompt injection, tool poisoning, and credential theft. Publicly available CVE feeds often lag behind the speed at which these vulnerabilities reach production. Agent Threat Rules (ATR) is an open framework designed to detect threats targeting AI agents.

CVE Lite CLI

CVE Lite CLI is an open-source dependency vulnerability scanner. Vulnerability scanning in JavaScript and TypeScript projects typically occurs late in development, forcing developers to address issues after code is written. CVE Lite CLI, now an OWASP Incubator Project, integrates vulnerability checks directly into the terminal, comparing project lockfiles against the Open Source Vulnerabilities database and providing fix commands for npm, pnpm, Yarn, and Bun.

DockSec

DockSec is an open-source AI-powered Docker security scanner. DockSec, an OWASP Incubator Project, combines three container security scanners with a language-model layer for explanation and remediation. Created by Advait Patel, the Python tool analyzes Dockerfiles and images using Trivy, Hadolint, and Docker Scout, correlates findings, assigns a 0-100 security score, and suggests line-specific fixes.

Lyrie

Lyrie is an open-source autonomous pentesting agent. Penetration testing has historically required extensive manual effort, specialized tools, and teams with narrow expertise. Lyrie, developed by OTT Cybersecurity, condenses this process into a command-line tool and publishes its entire codebase for transparency.

DarkMoon

DarkMoon is an open-source AI pentesting platform. Traditional penetration testing relies on expert time, with specialists spending days manually probing networks or web applications. Manual engagements often span weeks, incur high costs, and produce inconsistent results. Automation offers a solution, and DarkMoon is an open-source platform that executes security assessments end-to-end, delivering evidence-based reports upon completion.

Microsoft AntiSSRF

Microsoft AntiSSRF open-source library mitigates server-side request forgery risks. AntiSSRF is an open-source code library from Microsoft that validates URLs and network connections to reduce server-side request forgery (SSRF) vulnerabilities in web applications. It supports .NET and Node.js environments and is distributed under the MIT license. The library functions as a drop-in component, enabling developers to verify untrusted input before applications make outbound requests.

Microsoft open-sources tools for AI agent development

Microsoft has released two tools to enhance security in AI agent development: Clarity, a structured design review tool, and RAMPART, a continuous testing framework. These tools originate from Microsoft’s AI Red Team, which evaluates internal AI systems, and both have been used internally prior to open-sourcing.

Nika

Nika is an open-source code analysis tool. Many web application vulnerabilities span multiple files, challenging file-by-file scanners to detect them. Nika, developed by PhonePe, performs cross-file taint analysis for Java microservices, tracing untrusted input across application layers to identify exploitable data flows.

OpenHack

OpenHack is an open-source AI-powered vulnerability research tool. AI coding assistants like Claude Code, Codex, and Cursor are used for source-guided vulnerability research. OpenHack, a MIT-licensed project from Hadrian, organizes this approach into a file-based workspace that enables agent-driven code reviews across multiple coding environments, with durable state stored in plain files and support for human-in-the-loop approval.

Open-source privacy proxy

Open-source privacy proxy obscures PII before prompts reach external AI services. Enterprise developers frequently send prompts containing customer emails, support transcripts, and other sensitive data to external large language models without sanitization. Dataiku has released Kiji Privacy Proxy, an open-source local gateway that detects and masks personally identifiable information before requests exit the network.

OWASP Agent Memory Guard

OWASP Agent Memory Guard prevents AI agents from being exploited via memory manipulation. AI agents rely on persistent memory across sessions, creating opportunities for attackers to inject malicious instructions that alter future behavior. Agent Memory Guard is an open-source runtime defense layer that monitors memory reads and writes using detection pipelines and policy-based controls.

Pipelock

Pipelock is an open-source AI agent firewall. AI coding agents often have shell access, environment variables containing API keys, and unrestricted internet connectivity, creating single points of failure where a compromised tool call could expose credentials. Pipelock, developed by Joshua Waldrep under the PipeLab project, addresses this risk by inserting an enforcement layer between agents and network connections.

Praxen

Praxen is an open-source AI agent behavior verification tool. Praxen’s primary function is to validate whether AI agents perform as claimed. The tool compares an agent’s stated policy with its actual behavior, highlighting discrepancies.

Rustinel

Rustinel is an open-source endpoint detection solution for Windows and Linux. Open-source endpoint detection tools have traditionally been divided between Windows-focused solutions using Sysmon and Linux-focused tools relying on eBPF or auditd. Defenders managing mixed environments face challenges with fragmented pipelines and maintenance burdens. Rustinel, a Rust-based endpoint agent, aims to unify these capabilities into a single codebase.

Sandyaa

Sandyaa is an open-source autonomous security bug hunter. Traditional source code auditing relies on static analyzers that generate long lists of potential issues, leaving engineers to distinguish real vulnerabilities from noise. Sandyaa, developed by SecureLayer7, uses large language models to analyze codebases, trace data flow, and generate exploit code for confirmed vulnerabilities. The tool is distributed under the MIT license.

Vigolium

Vigolium is an open-source vulnerability scanner. Vigolium combines deterministic scanning with AI-driven auditing. It includes over 235 scanner modules and an AI agent that automates endpoint discovery, attack planning, vulnerability triage, source code audits, and dynamic security testing.

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