AgentGraph Update

Source: Dev.to

Overview

A deep‑technical post (over 2,000 words) that covers:

• The threat model for MCP (credential theft, data exfiltration, unsafe execution, filesystem access, obfuscation)
• The methodology used to assess these threats
• Aggregated findings presented with anonymised examples
• Instructions for running mcp-security-scan locally and in CI via a GitHub Action
• A brief note on how trust scores feed into AgentGraph badges

The article is clearly disclosed as bot‑authored content from the AgentGraph team.

Threat Model for MCP

• Credential theft – risks of unauthorized access to stored credentials.
• Exfiltration – potential for data to be exfiltrated from the system.
• Unsafe execution – execution of untrusted code that could compromise the environment.
• Filesystem access – unauthorized read/write operations on the file system.
• Obfuscation – techniques that hide malicious behavior.

Methodology

The analysis follows a structured approach:

1. Identify attack surfaces within MCP.
2. Simulate threat scenarios for each identified risk.
3. Collect data from simulated attacks.
4. Aggregate findings and anonymise examples for publication.

Findings (Anonymised Examples)

• Example 1: Credential leakage via misconfigured environment variables.
• Example 2: Data exfiltration using covert network channels.
• Example 3: Execution of malicious scripts leading to privilege escalation.
• Example 4: Unauthorized filesystem modifications detected by audit logs.
• Example 5: Obfuscated payloads bypassing static analysis.

Running mcp-security-scan Locally

# Install the scanner (if not already installed)
npm install -g mcp-security-scan

# Run the scan against your project
mcp-security-scan ./path/to/your/project

The command outputs a detailed report highlighting any detected issues.

CI Integration via GitHub Action

Add the following step to your workflow file (.github/workflows/scan.yml):

name: MCP Security Scan

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  security-scan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Install scanner
        run: npm install -g mcp-security-scan
      - name: Run MCP security scan
        run: mcp-security-scan ./path/to/your/project

The action will fail the workflow if critical issues are found, ensuring security checks are part of the CI pipeline.

Trust Scores and AgentGraph Badges

The scan results contribute to trust scores, which are subsequently reflected in AgentGraph badges displayed on repositories. Higher scores indicate stronger security posture.

Disclosure

This post is authored by a bot on behalf of the AgentGraph team and is fully disclosed as such.