brew-vulns

A Homebrew subcommand that checks installed packages for known vulnerabilities using the OSV.dev database.

Installation

Via Homebrew:

brew install homebrew/brew-vulns/brew-vulns

Or via RubyGems:

gem install brew-vulns

Once installed, the command is available as brew vulns.

Usage

brew vulns [formula...] [options]

Options

Flag	Long form	Description
	--all	Scan every formula in homebrew-core
-b PATH	--brewfile PATH	Scan packages from a Brewfile (default: ./Brewfile)
-d	--deps	Include dependencies when checking a specific formula or Brewfile
-j	--json	Output results as JSON
	--cyclonedx	Output results as CycloneDX SBOM with vulnerabilities
	--sarif	Output results as SARIF for GitHub code scanning
-m N	--max-summary N	Truncate summaries to N characters (default: 60, 0 for no limit)
-s LEVEL	--severity LEVEL	Only show vulnerabilities at or above LEVEL (low, medium, high, critical)
-h	--help	Show help message

Examples

# Check all installed packages
brew vulns

# Scan every formula in homebrew-core
brew vulns --all --json > vulns.json

# Check a specific formula (does not need to be installed)
brew vulns openssl

# Check several formulae at once
brew vulns vim curl jq

# Check a formula and its dependencies
brew vulns python --deps

# Scan packages from a Brewfile
brew vulns --brewfile

# Scan a specific Brewfile
brew vulns -b ~/project/Brewfile

# Scan Brewfile packages and their dependencies
brew vulns --brewfile --deps

# Output as JSON (useful for CI/CD)
brew vulns --json

# Show longer summaries
brew vulns --max-summary 100

# Show full summaries (no truncation)
brew vulns -m 0

# Only show HIGH and CRITICAL vulnerabilities
brew vulns --severity high

# Output as CycloneDX SBOM with vulnerabilities
brew vulns --cyclonedx > sbom.cdx.json

# Output as SARIF for GitHub code scanning
brew vulns --sarif > results.sarif

# Show help
brew vulns --help

How it works

1. Reads Homebrew formulae via brew info --json=v2 (installed packages by default, or any named formulae passed as arguments)
2. Extracts the repository URL and version tag from each formula's source URL
3. Queries the OSV API using the GIT ecosystem to find known vulnerabilities
4. Reports any vulnerabilities found with their severity and CVE identifiers

Packages with GitHub, GitLab, or Codeberg source URLs are checked. Packages from other sources are skipped.

Example output

Checking 104 packages for vulnerabilities...
(119 packages skipped - no supported source URL)

expat (2.7.3)
  CVE-2025-66382 (HIGH) - XML parsing vulnerability...

hdf5 (1.14.6)
  OSV-2023-1091 (MEDIUM) - Buffer overflow in...
  OSV-2023-1223 (MEDIUM) - ...

Found 15 vulnerabilities in 3 packages

Exit codes

• 0 - No vulnerabilities found
• 1 - Vulnerabilities found
• 2 - An error occurred (network failure, brew failure, parse error)

This makes it suitable for use in CI/CD pipelines. To let a job continue when vulnerabilities are found but still fail on scan errors, use brew vulns ... || [ $? -eq 1 ].

GitHub Actions

Use the --sarif flag to integrate with GitHub code scanning:

name: Vulnerability Scan

on:
  schedule:
    - cron: '0 0 * * *'
  workflow_dispatch:

jobs:
  scan:
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install brew-vulns
        run: gem install brew-vulns

      - name: Run vulnerability scan
        run: brew vulns --sarif > results.sarif || [ $? -eq 1 ]

      - name: Upload SARIF results
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: results.sarif

Dependency graph integration

Use the --cyclonedx flag to submit an SBOM to GitHub's dependency graph:

name: SBOM Submission

on:
  schedule:
    - cron: '0 0 * * *'
  workflow_dispatch:

jobs:
  sbom:
    runs-on: macos-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4

      - name: Install brew-vulns
        run: gem install brew-vulns

      - name: Generate SBOM
        run: brew vulns --cyclonedx > sbom.cdx.json || [ $? -eq 1 ]

      - name: Submit to dependency graph
        uses: evryfs/sbom-dependency-submission-action@v0
        with:
          sbom-files: sbom.cdx.json

This adds your Homebrew packages to the repository's dependency graph, enabling Dependabot alerts.

See examples/ for workflows that check changed formulae on tap pull requests and publish a daily scan of all of homebrew-core.

Development

git clone https://github.com/Homebrew/homebrew-brew-vulns
cd brew-vulns
bin/setup
rake test

License

MIT License. See LICENSE for details.