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MEDUSA

AI-first security scanner for LLM, agent, MCP, and RAG codebases

MEDUSA is an AGPL-3.0 AI-first security scanner from Pantheon Security that checks AI and machine-learning applications, LLM agents, MCP workflows, RAG pipelines, repository-poisoning risks, secrets, and agent-specific compromise patterns.

About MEDUSA

MEDUSA from Pantheon Security is an AI-focused security scanner for repositories and application workflows that include machine-learning code, LLM integrations, agents, MCP components, or RAG pipelines. Its CLI-oriented workflow is designed to bring AI-specific checks into developer and DevSecOps review paths.

Official project materials highlight detection areas such as prompt injection, MCP vulnerabilities, RAG and repository poisoning, secrets, and compromise patterns involving agent-development environments. Those checks complement conventional scanning by focusing on risks introduced by prompts, retrieval content, tool connections, and AI-oriented project files.

MEDUSA is licensed under AGPL-3.0-or-later, which can affect deployment and redistribution decisions and should be reviewed before organizational adoption. Detection coverage and rule-count claims are point-in-time project claims, and the scanner should complement rather than replace complete SAST, SCA, secrets management, dependency review, and human security testing.

Pricing & Platform Specs

Pricing Summary

Medusa is 100% free and open-source under the GNU Affero General Public License v3.0 (AGPL-3.0). All core detection capabilities—including scanning for prompt injections, malicious MCP servers, and secrets leaks—can be run locally or integrated into CI/CD pipelines without licensing fees.

Supported Platforms

Python package and CLI for scanning repositories and AI application code, including LLM, agent, MCP, and RAG security patterns.

Explore categories, tags & use cases

Community experience

Sources & verification

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Content verified

Verification dates are editorial checks. Routine CMS saves and automatic updatedAt timestamps do not advance them.

FAQ

What is MEDUSA?

MEDUSA is an AGPL-3.0 AI-first security scanner from Pantheon Security that checks AI and machine-learning applications, LLM agents, MCP workflows, RAG pipelines, repository-poisoning risks, secrets, and agent-specific compromise patterns.

Is MEDUSA free?

Yes — MEDUSA is open source and free to use. Medusa is 100% free and open-source under the GNU Affero General Public License v3.0 (AGPL-3.0). All core detection capabilities—including scanning for prompt injections, malicious MCP servers, and secrets leaks—can be run locally or integrated into CI/CD pipelines without licensing fees.

Is MEDUSA open source?

Yes — MEDUSA is open source.

Is MEDUSA still maintained?

Yes — MEDUSA is active. Its listing was last verified on August 26, 2026.