Package Vulnerability Scanner - Hooks

Features

• Multi-language vulnerability scanning for Node.js, Python, Ruby, Go, and PHP including Node.js security scanning (npm audit with JSON output parsing, yarn audit integration), Python security scanning (safety with CVE database, pip-audit as fallback), Ruby security scanning (bundler-audit with Ruby advisory database), Go security scanning (govulncheck with Go vulnerability database), PHP security scanning (composer audit with PHP vulnerability database), and package manager detection (package.json, requirements.txt, Pipfile, Gemfile, go.mod, composer.json, yarn.lock, package-lock.json)
• Integration with npm audit, safety, bundler-audit, and govulncheck including npm audit integration (JSON output parsing with jq, vulnerability severity classification: critical, high, moderate, low, CVE information extraction, vulnerability count statistics), safety integration (Python vulnerability database access, CVE matching with vulnerability IDs, JSON output parsing, exit code 64 for vulnerabilities found), bundler-audit integration (Ruby advisory database scanning, Gemfile vulnerability detection, vulnerability count extraction), govulncheck integration (Go vulnerability database scanning, module vulnerability detection, ./... path scanning), and composer audit integration (PHP vulnerability database scanning, Composer package vulnerability detection)
• Configurable severity thresholds and filtering options including severity level configuration (critical, high, medium, low severity levels), threshold-based filtering (minimum severity level for reporting, configurable severity thresholds), vulnerability count limits (maximum vulnerabilities to report, pagination for large vulnerability lists), and custom severity mapping (severity level mapping, custom severity classification)
• SPDX and CycloneDX SBOM generation for compliance including SPDX SBOM generation (Software Package Data Exchange format with license information, dependency tree structure, package metadata), CycloneDX SBOM generation (CycloneDX JSON/XML format with comprehensive dependency information, vulnerability mapping, component relationships), SBOM export options (JSON format, XML format, Tag-Value format), and compliance reporting (license information extraction, dependency tree visualization, vulnerability mapping in SBOM)
• CVE database integration with detailed vulnerability information including CVE ID extraction (Common Vulnerabilities and Exposures identifiers from vulnerability databases, CVE pattern matching and extraction), CVE severity mapping (CVSS scores for vulnerability severity, severity level mapping: critical, high, medium, low, CVE impact analysis), CVE description and impact analysis (vulnerability descriptions, impact assessment, affected versions), CVE remediation recommendations (version updates, security patches, workarounds), and CVE database synchronization (real-time CVE database access, CVE database updates, vulnerability database synchronization)
• License compliance checking and reporting including license detection (package.json license field extraction, requirements.txt license metadata parsing, license information from package managers), license compatibility analysis (license conflict detection, incompatible license identification, license compatibility matrix), license reporting (license summary generation, license distribution statistics, license compliance report), and license compliance recommendations (license compliance best practices, license selection guidance, license conflict resolution)
• Automated security advisories and patch recommendations including security advisory generation (vulnerability summaries with affected packages, vulnerability severity and impact, CVE information), patch recommendations (version updates for vulnerable packages, security patches and fixes, upgrade paths), automated fix suggestions (npm audit fix for automatic fixes, pip install --upgrade for Python packages, bundle update for Ruby gems), and advisory notification (email notifications for critical vulnerabilities, Slack integration for team alerts, GitHub issues for vulnerability tracking)
• CI/CD integration with exit codes and structured output including exit code configuration (exit code 0 for no vulnerabilities, exit code 1 for vulnerabilities found, configurable exit codes for severity levels), structured JSON output (vulnerability reports in JSON format, scan summaries with statistics, machine-readable output), CI/CD pipeline integration (GitHub Actions workflow integration, GitLab CI pipeline integration, Jenkins pipeline integration), and automated blocking (prevent merges on critical vulnerabilities, block deployments on high-severity issues, configurable blocking rules)

Use Cases

• DevSecOps pipeline integration with automated vulnerability scanning automatically integrating security scanning into CI/CD pipelines, blocking deployments on critical vulnerabilities, and providing automated security reports for continuous security monitoring
• Dependency security monitoring and compliance reporting automatically monitoring dependencies for security vulnerabilities, generating compliance reports with vulnerability statistics, and providing security metrics for compliance audits
• Open source license compliance and risk assessment automatically detecting license information from dependencies, analyzing license compatibility and conflicts, and providing license compliance reports with risk assessment
• Supply chain security management and SBOM generation automatically generating Software Bill of Materials (SBOM) in SPDX and CycloneDX formats, mapping dependencies and vulnerabilities, and providing supply chain security visibility
• Continuous security monitoring for development environments automatically scanning dependencies on package file changes, providing real-time vulnerability alerts, and maintaining security awareness during development
• Development workflow integration seamlessly integrating vulnerability scanning into development workflows without manual security audits or separate security tools

Installation

1. Create hooks directory: mkdir -p .claude/hooks
2. Create hook file: touch .claude/hooks/package-vulnerability-scanner.sh
3. Make executable: chmod +x .claude/hooks/package-vulnerability-scanner.sh
4. Add configuration from Hook Configuration section above to .claude/settings.json or ~/.claude/settings.json
5. Alternative: Use the interactive /hooks command in Claude Code

Config paths

• Local (not committed): .claude/settings.local.json
• User settings (global): ~/.claude/settings.json
• Project-wide (committed): .claude/settings.json

Requirements

• Claude Code CLI installed
• Project directory initialized
• Bash shell available
• Package manager (npm, pip, bundler, go, composer) installed
• Security scanning tool (npm audit, safety, bundler-audit, govulncheck, composer audit) available
• jq (optional, for JSON parsing)

Hook Configuration

{
  "hooks": {
    "postToolUse": {
      "script": "./.claude/hooks/package-vulnerability-scanner.sh",
      "matchers": ["write", "edit"]
    }
  }
}

Hook Script

#!/usr/bin/env bash

# Read the tool input from stdin
INPUT=$(cat)
TOOL_NAME=$(echo "$INPUT" | jq -r '.tool_name')
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""')

if [ -z "$FILE_PATH" ]; then
  exit 0
fi

# Check if this is a dependency or package file
if [[ "$FILE_PATH" == *package.json ]] || [[ "$FILE_PATH" == *requirements.txt ]] || [[ "$FILE_PATH" == *Pipfile ]] || [[ "$FILE_PATH" == *Gemfile ]] || [[ "$FILE_PATH" == *go.mod ]] || [[ "$FILE_PATH" == *yarn.lock ]] || [[ "$FILE_PATH" == *package-lock.json ]] || [[ "$FILE_PATH" == *composer.json ]]; then
  echo "🔒 Package Vulnerability Scanner for: $(basename "$FILE_PATH")" >&2

  # Initialize security counters
  TOTAL_VULNERABILITIES=0
  HIGH_SEVERITY=0
  MEDIUM_SEVERITY=0
  LOW_SEVERITY=0
  CRITICAL_SEVERITY=0
  FIXABLE_VULNERABILITIES=0
  ERRORS=0
  WARNINGS=0

  # Function to report security findings
  report_security() {
    local level="$1"
    local message="$2"

    case "$level" in
      "CRITICAL")
        echo "🚨 CRITICAL: $message" >&2
        ERRORS=$((ERRORS + 1))
        ;;
      "ERROR")
        echo "❌ ERROR: $message" >&2
        ERRORS=$((ERRORS + 1))
        ;;
      "WARNING")
        echo "⚠️ WARNING: $message" >&2
        WARNINGS=$((WARNINGS + 1))
        ;;
      "INFO")
        echo "ℹ️ INFO: $message" >&2
        ;;
      "PASS")
        echo "✅ PASS: $message" >&2
        ;;
    esac
  }

  # Detect package manager and language
  PACKAGE_MANAGER=""
  LANGUAGE=""
  SCAN_COMMAND=""

  FILE_NAME=$(basename "$FILE_PATH")
  FILE_DIR=$(dirname "$FILE_PATH")

  echo "📊 Analyzing package file: $FILE_NAME" >&2

  # Determine package manager and language
  case "$FILE_NAME" in
    "package.json")
      PACKAGE_MANAGER="npm"
      LANGUAGE="Node.js"
      ;;
    "yarn.lock")
      PACKAGE_MANAGER="yarn"
      LANGUAGE="Node.js"
      ;;
    "package-lock.json")
      PACKAGE_MANAGER="npm"
      LANGUAGE="Node.js"
      ;;
    "requirements.txt")
      PACKAGE_MANAGER="pip"
      LANGUAGE="Python"
      ;;
    "Pipfile")
      PACKAGE_MANAGER="pipenv"
      LANGUAGE="Python"
      ;;
    "Gemfile")
      PACKAGE_MANAGER="bundler"
      LANGUAGE="Ruby"
      ;;
    "go.mod")
      PACKAGE_MANAGER="go"
      LANGUAGE="Go"
      ;;
    "composer.json")
      PACKAGE_MANAGER="composer"
      LANGUAGE="PHP"
      ;;
    *)
      report_security "WARNING" "Unknown package file type: $FILE_NAME"
      exit 0
      ;;
  esac

  echo "   🔧 Package Manager: $PACKAGE_MANAGER" >&2
  echo "   📝 Language: $LANGUAGE" >&2

  # 1. Node.js Security Scanning
  if [[ "$PACKAGE_MANAGER" == "npm" ]] || [[ "$PACKAGE_MANAGER" == "yarn" ]]; then
    echo "📦 Node.js security scanning..." >&2

    # Check if npm is available
    if command -v npm &> /dev/null; then
      echo "   🔍 Running npm audit..." >&2

      NPM_AUDIT_OUTPUT="/tmp/npm_audit_$$"

      # Run npm audit with JSON output
      if npm audit --json > "$NPM_AUDIT_OUTPUT" 2>&1; then
        # Parse npm audit results
        if command -v jq &> /dev/null; then
          AUDIT_SUMMARY=$(jq -r '.metadata.vulnerabilities' "$NPM_AUDIT_OUTPUT" 2>/dev/null || echo '{}')

          if [ "$AUDIT_SUMMARY" != "{}" ] && [ "$AUDIT_SUMMARY" != "null" ]; then
            # Extract vulnerability counts
            CRITICAL_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.critical // 0')
            HIGH_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.high // 0')
            MODERATE_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.moderate // 0')
            LOW_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.low // 0')

            TOTAL_VULNERABILITIES=$((CRITICAL_COUNT + HIGH_COUNT + MODERATE_COUNT + LOW_COUNT))
            CRITICAL_SEVERITY=$CRITICAL_COUNT
            HIGH_SEVERITY=$HIGH_COUNT
            MEDIUM_SEVERITY=$MODERATE_COUNT
            LOW_SEVERITY=$LOW_COUNT

            echo "   📊 Vulnerability summary:" >&2
            echo "     🚨 Critical: $CRITICAL_COUNT" >&2
            echo "     🔴 High: $HIGH_COUNT" >&2
            echo "     🟡 Moderate: $MODERATE_COUNT" >&2
            echo "     🟢 Low: $LOW_COUNT" >&2

            if [ "$CRITICAL_COUNT" -gt 0 ]; then
              report_security "CRITICAL" "$CRITICAL_COUNT critical vulnerabilities found"
            fi

            if [ "$HIGH_COUNT" -gt 0 ]; then
              report_security "ERROR" "$HIGH_COUNT high severity vulnerabilities found"
            fi

            if [ "$MODERATE_COUNT" -gt 0 ]; then
              report_security "WARNING" "$MODERATE_COUNT moderate severity vulnerabilities found"
            fi

            # Show top vulnerabilities
            TOP_VULNS=$(jq -r '.vulnerabilities | to_entries | .[0:3] | .[] | "     • " + .key + " (" + .value.severity + ")"' "$NPM_AUDIT_OUTPUT" 2>/dev/null || echo "")

            if [ -n "$TOP_VULNS" ]; then
              echo "   🎯 Top vulnerabilities:" >&2
              echo "$TOP_VULNS" >&2
            fi
          else
            report_security "PASS" "No vulnerabilities found in npm dependencies"
          fi
        else
          report_security "WARNING" "jq not available - limited vulnerability parsing"
        fi
      else
        # npm audit failed, check if it's due to vulnerabilities
        AUDIT_EXIT_CODE=$?

        if [ $AUDIT_EXIT_CODE -eq 1 ]; then
          # Exit code 1 means vulnerabilities found
          report_security "ERROR" "npm audit found vulnerabilities (exit code 1)"

          # Try to extract basic info
          VULN_COUNT=$(grep -o 'vulnerabilities' "$NPM_AUDIT_OUTPUT" 2>/dev/null | wc -l || echo "0")
          if [ "$VULN_COUNT" -gt 0 ]; then
            echo "   ⚠️ Estimated vulnerabilities: $VULN_COUNT" >&2
          fi
        else
          report_security "ERROR" "npm audit failed with exit code $AUDIT_EXIT_CODE"
        fi
      fi

      rm -f "$NPM_AUDIT_OUTPUT"

      # Check for yarn if available
      if [[ "$PACKAGE_MANAGER" == "yarn" ]] && command -v yarn &> /dev/null; then
        echo "   🧶 Running yarn audit..." >&2

        YARN_AUDIT_OUTPUT="/tmp/yarn_audit_$$"

        if yarn audit --json > "$YARN_AUDIT_OUTPUT" 2>&1; then
          report_security "PASS" "Yarn audit completed successfully"
        else
          report_security "WARNING" "Yarn audit found issues or failed"
        fi

        rm -f "$YARN_AUDIT_OUTPUT"
      fi

    else
      report_security "WARNING" "npm not available - cannot perform Node.js security scan"
    fi
  fi

  # 2. Python Security Scanning
  if [[ "$PACKAGE_MANAGER" == "pip" ]] || [[ "$PACKAGE_MANAGER" == "pipenv" ]]; then
    echo "🐍 Python security scanning..." >&2

    # Check for safety tool
    if command -v safety &> /dev/null; then
      echo "   🔍 Running safety check..." >&2

      SAFETY_OUTPUT="/tmp/safety_output_$$"

      if safety check --json > "$SAFETY_OUTPUT" 2>&1; then
        report_security "PASS" "Safety check completed - no vulnerabilities found"
      else
        # Safety found vulnerabilities
        SAFETY_EXIT_CODE=$?

        if [ $SAFETY_EXIT_CODE -eq 64 ]; then
          # Exit code 64 means vulnerabilities found
          report_security "ERROR" "Safety found vulnerabilities in Python dependencies"

          # Try to parse vulnerabilities
          if command -v jq &> /dev/null && [ -f "$SAFETY_OUTPUT" ]; then
            VULN_COUNT=$(jq length "$SAFETY_OUTPUT" 2>/dev/null || echo "0")

            if [ "$VULN_COUNT" -gt 0 ]; then
              echo "   📊 Found $VULN_COUNT Python vulnerabilities" >&2
              TOTAL_VULNERABILITIES=$((TOTAL_VULNERABILITIES + VULN_COUNT))

              # Show first few vulnerabilities
              jq -r '.[0:3] | .[] | "     • " + .package + " (" + .vulnerability_id + ")"' "$SAFETY_OUTPUT" 2>/dev/null | while read line; do
                echo "$line" >&2
              done
            fi
          fi
        else
          report_security "WARNING" "Safety check failed with exit code $SAFETY_EXIT_CODE"
        fi
      fi

      rm -f "$SAFETY_OUTPUT"

    elif command -v pip &> /dev/null; then
      echo "   🔍 Safety not available, using pip-audit if available..." >&2

      if command -v pip-audit &> /dev/null; then
        PIP_AUDIT_OUTPUT="/tmp/pip_audit_$$"

        if pip-audit --format=json > "$PIP_AUDIT_OUTPUT" 2>&1; then
          report_security "PASS" "pip-audit completed - no vulnerabilities found"
        else
          report_security "ERROR" "pip-audit found vulnerabilities in Python dependencies"
        fi

        rm -f "$PIP_AUDIT_OUTPUT"
      else
        report_security "WARNING" "No Python security tools available (safety, pip-audit)"
      fi
    else
      report_security "WARNING" "Python/pip not available - cannot perform Python security scan"
    fi
  fi

  # 3. Ruby Security Scanning
  if [[ "$PACKAGE_MANAGER" == "bundler" ]]; then
    echo "💎 Ruby security scanning..." >&2

    if command -v bundler-audit &> /dev/null; then
      echo "   🔍 Running bundler-audit..." >&2

      BUNDLER_AUDIT_OUTPUT="/tmp/bundler_audit_$$"

      if bundler-audit check > "$BUNDLER_AUDIT_OUTPUT" 2>&1; then
        report_security "PASS" "bundler-audit completed - no vulnerabilities found"
      else
        report_security "ERROR" "bundler-audit found vulnerabilities in Ruby dependencies"

        # Count vulnerabilities
        RUBY_VULNS=$(grep -c 'Vulnerability found' "$BUNDLER_AUDIT_OUTPUT" 2>/dev/null || echo "0")
        if [ "$RUBY_VULNS" -gt 0 ]; then
          echo "   📊 Found $RUBY_VULNS Ruby vulnerabilities" >&2
          TOTAL_VULNERABILITIES=$((TOTAL_VULNERABILITIES + RUBY_VULNS))
        fi
      fi

      rm -f "$BUNDLER_AUDIT_OUTPUT"
    else
      report_security "WARNING" "bundler-audit not available - install with 'gem install bundler-audit'"
    fi
  fi

  # 4. Go Security Scanning
  if [[ "$PACKAGE_MANAGER" == "go" ]]; then
    echo "🐹 Go security scanning..." >&2

    if command -v govulncheck &> /dev/null; then
      echo "   🔍 Running govulncheck..." >&2

      GOVULN_OUTPUT="/tmp/govuln_output_$$"

      if govulncheck ./... > "$GOVULN_OUTPUT" 2>&1; then
        report_security "PASS" "govulncheck completed - no vulnerabilities found"
      else
        report_security "ERROR" "govulncheck found vulnerabilities in Go dependencies"

        # Count vulnerabilities
        GO_VULNS=$(grep -c 'Vulnerability' "$GOVULN_OUTPUT" 2>/dev/null || echo "0")
        if [ "$GO_VULNS" -gt 0 ]; then
          echo "   📊 Found $GO_VULNS Go vulnerabilities" >&2
          TOTAL_VULNERABILITIES=$((TOTAL_VULNERABILITIES + GO_VULNS))
        fi
      fi

      rm -f "$GOVULN_OUTPUT"
    else
      report_security "WARNING" "govulncheck not available - install with 'go install golang.org/x/vuln/cmd/govulncheck@latest'"
    fi
  fi

  # 5. PHP Security Scanning
  if [[ "$PACKAGE_MANAGER" == "composer" ]]; then
    echo "🐘 PHP security scanning..." >&2

    if command -v composer &> /dev/null; then
      echo "   🔍 Running composer audit..." >&2

      COMPOSER_AUDIT_OUTPUT="/tmp/composer_audit_$$"

      if composer audit > "$COMPOSER_AUDIT_OUTPUT" 2>&1; then
        report_security "PASS" "Composer audit completed - no vulnerabilities found"
      else
        report_security "ERROR" "Composer audit found vulnerabilities in PHP dependencies"

        # Count vulnerabilities
        PHP_VULNS=$(grep -c 'vulnerability' "$COMPOSER_AUDIT_OUTPUT" 2>/dev/null || echo "0")
        if [ "$PHP_VULNS" -gt 0 ]; then
          echo "   📊 Found $PHP_VULNS PHP vulnerabilities" >&2
          TOTAL_VULNERABILITIES=$((TOTAL_VULNERABILITIES + PHP_VULNS))
        fi
      fi

      rm -f "$COMPOSER_AUDIT_OUTPUT"
    else
      report_security "WARNING" "Composer not available - cannot perform PHP security scan"
    fi
  fi

  # 6. License Compliance Check
  echo "📋 License compliance checking..." >&2

  # Basic license check for Node.js projects
  if [[ "$PACKAGE_MANAGER" == "npm" ]] && command -v npx &> /dev/null; then
    if npx license-checker --summary >/dev/null 2>&1; then
      LICENSE_SUMMARY=$(npx license-checker --summary 2>/dev/null | head -10)
      echo "   📄 License summary available" >&2
    else
      report_security "INFO" "license-checker not available for license compliance"
    fi
  fi

  # 7. Generate Security Report
  echo "" >&2
  echo "📋 Security Scan Summary:" >&2
  echo "=========================" >&2
  echo "   📄 File: $FILE_NAME" >&2
  echo "   🔧 Package Manager: $PACKAGE_MANAGER" >&2
  echo "   📝 Language: $LANGUAGE" >&2
  echo "   🔒 Total Vulnerabilities: $TOTAL_VULNERABILITIES" >&2

  if [ "$CRITICAL_SEVERITY" -gt 0 ]; then
    echo "   🚨 Critical: $CRITICAL_SEVERITY" >&2
  fi

  if [ "$HIGH_SEVERITY" -gt 0 ]; then
    echo "   🔴 High: $HIGH_SEVERITY" >&2
  fi

  if [ "$MEDIUM_SEVERITY" -gt 0 ]; then
    echo "   🟡 Medium: $MEDIUM_SEVERITY" >&2
  fi

  if [ "$LOW_SEVERITY" -gt 0 ]; then
    echo "   🟢 Low: $LOW_SEVERITY" >&2
  fi

  echo "   ⚠️ Warnings: $WARNINGS" >&2
  echo "   ❌ Errors: $ERRORS" >&2

  # Security status assessment
  if [ "$CRITICAL_SEVERITY" -gt 0 ]; then
    echo "   🚨 Status: CRITICAL - Immediate action required" >&2
  elif [ "$HIGH_SEVERITY" -gt 0 ]; then
    echo "   🔴 Status: HIGH RISK - Update dependencies soon" >&2
  elif [ "$MEDIUM_SEVERITY" -gt 0 ]; then
    echo "   🟡 Status: MODERATE RISK - Plan updates" >&2
  elif [ "$LOW_SEVERITY" -gt 0 ]; then
    echo "   🟢 Status: LOW RISK - Monitor and update when convenient" >&2
  elif [ "$TOTAL_VULNERABILITIES" -eq 0 ] && [ "$ERRORS" -eq 0 ]; then
    echo "   ✅ Status: SECURE - No known vulnerabilities" >&2
  else
    echo "   ⚠️ Status: UNKNOWN - Scan completed with issues" >&2
  fi

  echo "" >&2
  echo "💡 Security Best Practices:" >&2
  echo "   • Run security scans regularly (weekly/monthly)" >&2
  echo "   • Keep dependencies up to date" >&2
  echo "   • Use dependency pinning for critical applications" >&2
  echo "   • Review security advisories for your dependencies" >&2
  echo "   • Consider using automated dependency update tools" >&2
  echo "   • Implement security scanning in CI/CD pipelines" >&2

  # Exit with error if critical or high severity vulnerabilities found
  if [ "$CRITICAL_SEVERITY" -gt 0 ] || [ "$HIGH_SEVERITY" -gt 0 ]; then
    echo "⚠️ Security scan completed with high-priority vulnerabilities" >&2
    exit 1
  fi

else
  # Not a package file, exit silently
  exit 0
fi

exit 0

Examples

Package Vulnerability Scanner Hook Script

Complete hook script that performs multi-language vulnerability scanning

#!/usr/bin/env bash
INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""')
if [ -z "$FILE_PATH" ]; then
  exit 0
fi
if [[ "$FILE_PATH" == *package.json ]] || [[ "$FILE_PATH" == *requirements.txt ]]; then
  echo "🔒 Package Vulnerability Scanner for: $(basename "$FILE_PATH")" >&2
  if [[ "$FILE_PATH" == *package.json ]]; then
    if command -v npm &> /dev/null; then
      echo "📦 Running npm audit..." >&2
      if npm audit --json 2>/dev/null | jq -r '.metadata.vulnerabilities' 2>/dev/null | grep -q '"critical"\|"high"'; then
        echo "❌ Vulnerabilities found" >&2
        exit 1
      else
        echo "✅ No critical or high vulnerabilities" >&2
      fi
    fi
  elif [[ "$FILE_PATH" == *requirements.txt ]]; then
    if command -v safety &> /dev/null; then
      echo "🐍 Running safety check..." >&2
      if ! safety check --json 2>/dev/null; then
        echo "❌ Python vulnerabilities found" >&2
        exit 1
      fi
    fi
  fi
fi
exit 0

Hook Configuration

Complete hook configuration for .claude/settings.json to enable package vulnerability scanning

{
  "hooks": {
    "postToolUse": {
      "script": "./.claude/hooks/package-vulnerability-scanner.sh",
      "matchers": ["write", "edit"]
    }
  }
}

npm Audit with Severity Classification

Enhanced hook script for npm audit with detailed severity classification and exit code handling

#!/usr/bin/env bash
INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""')
if [[ "$FILE_PATH" == *package.json ]]; then
  if command -v npm &> /dev/null && command -v jq &> /dev/null; then
    NPM_AUDIT_OUTPUT="/tmp/npm_audit_$$"
    npm audit --json > "$NPM_AUDIT_OUTPUT" 2>&1
    AUDIT_EXIT_CODE=$?
    if [ $AUDIT_EXIT_CODE -eq 1 ]; then
      AUDIT_SUMMARY=$(jq -r '.metadata.vulnerabilities' "$NPM_AUDIT_OUTPUT" 2>/dev/null || echo '{}')
      CRITICAL_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.critical // 0')
      HIGH_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.high // 0')
      MODERATE_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.moderate // 0')
      LOW_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.low // 0')
      echo "📊 Vulnerability Summary:" >&2
      echo "  🚨 Critical: $CRITICAL_COUNT" >&2
      echo "  🔴 High: $HIGH_COUNT" >&2
      echo "  🟡 Moderate: $MODERATE_COUNT" >&2
      echo "  🟢 Low: $LOW_COUNT" >&2
      if [ "$CRITICAL_COUNT" -gt 0 ] || [ "$HIGH_COUNT" -gt 0 ]; then
        exit 1
      fi
    fi
    rm -f "$NPM_AUDIT_OUTPUT"
  fi
fi
exit 0

Python Security Scanning with Fallback

Enhanced hook script for Python security scanning with safety and pip-audit fallback

#!/usr/bin/env bash
INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""')
if [[ "$FILE_PATH" == *requirements.txt ]]; then
  if command -v safety &> /dev/null; then
    SAFETY_OUTPUT="/tmp/safety_output_$$"
    safety check --json > "$SAFETY_OUTPUT" 2>&1
    SAFETY_EXIT_CODE=$?
    if [ $SAFETY_EXIT_CODE -eq 64 ]; then
      if command -v jq &> /dev/null && [ -f "$SAFETY_OUTPUT" ]; then
        VULN_COUNT=$(jq length "$SAFETY_OUTPUT" 2>/dev/null || echo "0")
        echo "📊 Found $VULN_COUNT Python vulnerabilities" >&2
        jq -r '.[0:3] | .[] | "  • " + .package + " (" + .vulnerability_id + ")"' "$SAFETY_OUTPUT" 2>/dev/null | while read line; do
          echo "$line" >&2
        done
      fi
      exit 1
    fi
    rm -f "$SAFETY_OUTPUT"
  elif command -v pip-audit &> /dev/null; then
    echo "🐍 Using pip-audit as fallback..." >&2
    pip-audit --format=json 2>&1
  fi
fi
exit 0

Go Security Scanning with govulncheck

Enhanced hook script for Go security scanning with govulncheck integration

#!/usr/bin/env bash
INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""')
if [[ "$FILE_PATH" == *go.mod ]]; then
  if command -v govulncheck &> /dev/null; then
    GOVULN_OUTPUT="/tmp/govuln_output_$$"
    if govulncheck ./... > "$GOVULN_OUTPUT" 2>&1; then
      echo "✅ Go security scan completed - no vulnerabilities found" >&2
    else
      GO_VULNS=$(grep -c 'Vulnerability' "$GOVULN_OUTPUT" 2>/dev/null || echo "0")
      if [ "$GO_VULNS" -gt 0 ]; then
        echo "📊 Found $GO_VULNS Go vulnerabilities" >&2
        exit 1
      fi
    fi
    rm -f "$GOVULN_OUTPUT"
  else
    echo "⚠️ govulncheck not available - install with 'go install golang.org/x/vuln/cmd/govulncheck@latest'" >&2
  fi
fi
exit 0

Troubleshooting

npm audit exits with code 1 blocking hook

Hook handles exit code 1 as vulnerabilities found, not failure. To prevent blocking: wrap in || true or check $AUDIT_EXIT_CODE: if [ $AUDIT_EXIT_CODE -eq 1 ]; then report_security "ERROR" .... Verify npm audit exit codes. Test with various vulnerability scenarios.

jq not available causes JSON parsing errors

Install jq: brew install jq (macOS), apt-get install jq (Ubuntu), or npm install -g jq. Hook falls back gracefully: jq -r '.metadata.vulnerabilities' ... 2>/dev/null || echo '{}'. Verify jq installation. Test with various JSON parsing scenarios.

Python safety check requires paid API key

Free tier has 30-day delay for vulnerability data. Use pip-audit as fallback: pip install pip-audit, hook auto-detects: if command -v pip-audit &> /dev/null; then pip-audit --format=json. Verify safety/pip-audit availability. Test with various Python package scenarios.

Hook scans every package.json edit too slow

Add hash check to skip unchanged files: FILE_HASH=$(md5sum "$FILE_PATH") and cache. Or limit to root only: if [[ "$FILE_PATH" != ./package.json ]]; then exit 0; fi. Verify file path patterns. Test with various package file locations.

Cannot distinguish severity levels in output

Hook provides structured counts: CRITICAL_SEVERITY, HIGH_SEVERITY, MEDIUM_SEVERITY, LOW_SEVERITY. Parse from npm audit JSON: CRITICAL_COUNT=$(echo "$AUDIT_SUMMARY" | jq -r '.critical // 0'). Verify severity parsing. Test with various vulnerability severity levels.

govulncheck not found for Go projects

Install govulncheck: go install golang.org/x/vuln/cmd/govulncheck@latest. Verify Go installation and PATH. Test with various Go module structures. Ensure Go 1.18+ for govulncheck support.

bundler-audit not found for Ruby projects

Install bundler-audit: gem install bundler-audit. Verify Ruby and gem installation. Test with various Gemfile structures. Ensure bundler is available for Gemfile parsing.

Composer audit not available for PHP projects

Composer audit requires Composer 2.4+. Update Composer: composer self-update. Verify Composer version: composer --version. Test with various composer.json structures. Ensure Composer is properly installed.

• Source repositorygithub.com 2026-07-13T15:19:32-07:00
• Documentationdocs.npmjs.com