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  3. GhostFree
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GhostFree

User RatingsBe the first to rate and review this MCP server! Enrichment pendingWe haven’t run our AI enrichment pass on this listing yet, so the overview, use cases, and FAQ below may be sparse or missing. We work through the catalog over time β€” check back soon.
View RepositoryVisit Website

MCP server that scans your repo's dependencies for security vulnerabilities based on published CVEs.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent β€” or use 1-click editor setup below.

Add to CursorAdd to VS Code
Manual Client & Custom JSON ConfigExpand JSON β–Ύ

Client Config & Setup

Choose your client or environment
Target File:~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "ghostfree": {
      "command": "npx",
      "args": [
        "-y",
        "ghostfree"
      ]
    }
  }
}

πŸ’‘ Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Install Directory Badge Claim listing AlternativesπŸ”’ More in Security

Documentation Overview

GhostFree logo

What is GhostFree πŸš«πŸ‘»?

Every software team could use some help ridding their code base of the ghosts haunting their dependencies.

GhostFree is a local MCP server that scans your repository's dependencies for known vulnerabilities based on issued CVEs using OSV.dev, helps you triage and fix findings with NVD and CISA KEV enrichment, and lets you manage accepted risks β€” all directly from your AI coding assistant.

Quick Start

No installation, signup, or payment required. Add GhostFree to your MCP settings for whatever code tool you use and run /ghostfree.scan.

VS Code Copilot (Extension β€” easiest)

Search @mcp ghostfree in the Extensions view (Ctrl+Shift+X) and click Install. Then open the Command Palette (Ctrl+Shift+P), run MCP: List Servers, select GhostFree, choose Start Server, and confirm trust when prompted. No JSON config needed.

VS Code Copilot (Manual config)

Create or update .vscode/mcp.json in your project root:

config.json
{
  "servers": {
    "ghostfree": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "ghostfree", "--repo-path", "${workspaceFolder}"],
      "env": {}
    }
  }
}

Claude Code

Create .mcp.json in your project root:

config.json
{
  "mcpServers": {
    "ghostfree": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "ghostfree", "--repo-path", "."]
    }
  }
}

Cursor

Create .cursor/mcp.json:

config.json
{
  "mcpServers": {
    "ghostfree": {
      "command": "npx",
      "args": ["-y", "ghostfree", "--repo-path", "."]
    }
  }
}

Claude Desktop

Add to your claude_desktop_config.json (location varies by OS):

config.json
{
  "mcpServers": {
    "ghostfree": {
      "command": "npx",
      "args": ["-y", "ghostfree", "--repo-path", "/path/to/your/repo"]
    }
  }
}

How to Use

The /ghostfree.scan Prompt

The recommended way to run a scan is via the built-in prompt. In your AI client, type:

Code
/ghostfree.scan

This drives the following flow:

  1. Discover β€” finds all manifest files (requirements.txt, package.json, go.mod, Cargo.toml, pom.xml, *.csproj, etc.)
  2. Threshold β€” asks you for a minimum severity level (CRITICAL / HIGH / MEDIUM / LOW) if not already configured
  3. Scan β€” queries OSV.dev for CVEs across all discovered packages
  4. Triage β€” presents numbered results, 10 at a time. You pick which ones to investigate.
  5. Enrich β€” fetches CVSS vectors, CWE classification, and CISA KEV "actively exploited" status for your selections
  6. Remediate β€” recommends upgrades, code changes, or risk acceptance with a reason and expiry date

Example Session

Code
User: /ghostfree.scan

GhostFree: Discovering dependencies...
Found 84 packages across 2 ecosystems (npm, PyPI).

What minimum severity should I surface? (CRITICAL / HIGH / MEDIUM / LOW)

User: HIGH

GhostFree: Scanning against OSV.dev...

[1] CVE-2021-44228 CRITICAL (10.0) β€” org.apache.logging.log4j:log4j-core@2.14.1
    Log4Shell: Remote code execution via JNDI lookup
    Fix: upgrade to 2.17.1

[2] CVE-2022-25881 HIGH (7.5) β€” http-cache-semantics@4.1.0
    ReDoS in http-cache-semantics
    Fix: upgrade to 4.1.1

[3] CVE-2021-28918 CRITICAL (9.8) β€” netmask@1.0.6
    IP address parsing bypass (SSRF / allowlist bypass)
    Fix: upgrade to 1.1.0

Showing 1-3 of 3. Which would you like to investigate? (e.g., 1, 2, or 'all')

User: 3

GhostFree: [Calls enrich_cve CVE-2021-28918]

CVE-2021-28918 β€” netmask CRITICAL (9.8)
CVSS: 9.1 Β· CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-704 (Incorrect Type Conversion)
CISA KEV: Not listed

What it is: netmask@1.0.6 improperly parses octal-notation IP addresses (e.g. 010.0.0.1),
treating them as decimal. This enables SSRF protection bypass and IP allowlist/blocklist
bypass β€” an attacker can craft an address that appears private but routes to a public host.

Exploit status: Not in CISA KEV. Public PoC exists (SICK-2021-011), ~280k affected projects.

Codebase exposure: netmask is not directly imported β€” it appears in package-lock.json as a
transitive dependency of pac-resolver@3.0.0 (a transitive dev dependency). No direct
require('netmask') or IP parsing logic found. Reachability is very low.

Recommendation: Upgrade β€” low effort, patch version (1.0.6 β†’ 1.1.0), no API changes.
netmask is a transitive dependency; use npm audit fix or add a package.json overrides entry
to force netmask@1.1.0.

β†’ Reply with a number to investigate another CVE, 'back' to return to the list,
  'fix' to apply the recommended fix, 'accept' to record an accepted risk, or 'done' to wrap up.

Example: Accepting a Known Risk

Code
User: Accept CVE-2022-25881 β€” it's only in our CI test pipeline, not reachable in production. Expiry end of year.

GhostFree: [Calls accept_risk CVE-2022-25881]

Accepted risk recorded:
β€’ CVE-2022-25881 β€” http-cache-semantics (HIGH, CVSS 7.5)
  Reason: Only used in CI test pipeline, not reachable in production
  Expires: 2026-12-31
  ID: 550e8400-e29b-41d4-a716-446655440000

This acceptance is saved to .ghostfree/accepted.yml. Commit this file to share the
decision with your team. The CVE will be suppressed on future scans until expiry.

User: List all accepted risks

GhostFree: [Calls list_accepted_risks]

## Accepted Risks (1)

**CVE-2022-25881** β€” βœ… expires in 272 days (2026-12-31) | Severity at acceptance: HIGH (7.5)
  ID: 550e8400-e29b-41d4-a716-446655440000
  Reason: Only used in CI test pipeline, not reachable in production
  Accepted: 2026-04-03T10:00:00.000Z

Example: Enriching a Specific CVE

Code
User: Tell me everything about CVE-2021-44228

GhostFree: [Calls enrich_cve CVE-2021-44228]

## Enrichment: CVE-2021-44228

### NVD
CVSS Score: 10.0 Β· CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE: CWE-917 (Improper Neutralization of Special Elements in an Expression Language Statement)

References:
β€’ https://nvd.nist.gov/vuln/detail/CVE-2021-44228
β€’ https://logging.apache.org/log4j/2.x/security.html

### CISA KEV
⚠️ CONFIRMED actively exploited in the wild (added to KEV: 2021-12-10)

Tools Reference

ToolRead-onlyDescription
discover_dependenciesβœ…Scan repo manifests, return all pinned packages by ecosystem
check_cvesβœ…Query OSV.dev for CVEs, filter by severity, apply accepted risks
enrich_cveβœ…Fetch CVSS, CWE, references from NVD + KEV exploitation status
list_accepted_risksβœ…List all accepted risks with expiry status and severity snapshot
accept_risk❌Record an accepted risk with reason, expiry date, and severity snapshot
remove_accepted_risk❌Remove an accepted risk by UUID

All read-only tools are safe to auto-approve in your MCP client. Write tools (accept_risk, remove_accepted_risk) will prompt for confirmation.

check_cves Inputs

ParameterRequiredDescription
packagesYesArray of {name, version, ecosystem} β€” use discover_dependencies output
min_severityNoCRITICAL, HIGH, MEDIUM, or LOW. If not passed in, resolves in order of: GHOSTFREE_MIN_SEVERITY env var, then .ghostfree/config.yml, then prompts to choose

accept_risk Inputs

ParameterRequiredDescription
cve_idYesCVE ID, e.g. CVE-2021-44228
reasonYesBusiness justification
expires_onYesExpiry date in YYYY-MM-DD format
confirm_extended_expiryNoSet true if expiry is more than 1 year away
severityYesSeverity label at time of acceptance (CRITICAL, HIGH, MEDIUM, LOW, UNKNOWN) β€” snapshot, not live
cvss_scoreNoCVSS score at time of acceptance β€” snapshot, not live

Configuration

Create .ghostfree/config.yml in your repo root to set a persistent severity threshold that's shared with your team via source control:

yaml
min_severity: HIGH

This takes priority over the environment variable. If neither is set, GhostFree will prompt you to choose at scan time.

Environment Variables

VariableDescription
NVD_API_KEYOptional NVD API key for higher rate limits (50 req/30s vs 5 req/30s)
GHOSTFREE_MIN_SEVERITYOptional β€” skip the severity prompt and always use this threshold (CRITICAL, HIGH, MEDIUM, or LOW)
GHOSTFREE_DIROptional β€” use a custom directory instead of .ghostfree/ (applies to both accepted.yml and config.yml)

VS Code extension users: create a .env file in your workspace root β€” the extension reads it automatically and forwards the values to the server. For all other setups (manual MCP JSON config): add these to the "env" block in your client's config file (.vscode/mcp.json, .mcp.json, .cursor/mcp.json, claude_desktop_config.json, etc.), or export them as system environment variables.


Accepted Risk Management

When you accept a risk, GhostFree writes it to .ghostfree/accepted.yml in your repo root. Commit this file to share accepted decisions with your team.

yaml
accepted_risks:
  - id: 550e8400-e29b-41d4-a716-446655440000
    cve_id: CVE-2022-25881
    reason: Only used in CI test pipeline, not reachable in production
    expires_on: "2027-01-01"
    accepted_at: "2026-04-02T10:00:00.000Z"
    severity_at_acceptance: HIGH
    cvss_score_at_acceptance: 7.5

Rules:

  • expires_on is required β€” no open-ended acceptances
  • Expiry within 1 year: accepted immediately
  • Expiry beyond 1 year: requires confirm_extended_expiry=true
  • Expired acceptances are never silently dropped β€” they resurface as warnings on every scan

Supported Ecosystems & Manifests

Read the full README β†’View source on GitHub β†’

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Reviews

No reviews yet β€” be the first to share how this listing worked for you.

Frequently Asked Questions about GhostFree

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "ghostfree": { "command": "npx", "args": ["-y", "GhostFree"] } }

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Technical Specs & Signals

CategoryπŸ”’Security
More technical detailsExpand β–Ύ
TransportSTDIO
RuntimeNode.js
Last updatedSep 7, 2026
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28Quality signal: Emerging Β· 28/100How this signal is calculated β–Ύ
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Not scored for repo-hosted servers β€” we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20
Documentation & tools12/30
Adoption & activity1/15
Community engagement0/10

A guidance signal from public completeness & health data β€” not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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