Dependency Security Management
Tracking 20+ direct and 100+ transitive dependencies for security vulnerability monitoring
Symfony Dependency Security
20+ Direct Dependencies Tracked
Typical enterprise Symfony application includes 20+ direct Composer dependencies:
Direct Dependency Categories:
-
Symfony Components (10-15 packages):
- symfony/framework-bundle
- symfony/security-bundle
- symfony/doctrine-bundle
- symfony/twig-bundle
- symfony/validator
- symfony/form
- symfony/mailer
- symfony/messenger
- symfony/cache
- symfony/http-client
-
Third-Party Bundles (5-10 packages):
- doctrine/orm
- doctrine/doctrine-migrations-bundle
- knplabs/knp-menu-bundle
- friendsofsymfony/rest-bundle
- api-platform/core
- league/flysystem-bundle
-
Utility Libraries (5-10 packages):
- monolog/monolog
- guzzlehttp/guzzle
- symfony/dotenv
- symfony/webpack-encore-bundle
- phpunit/phpunit (dev)
100+ Transitive Dependencies Monitored
When including transitive dependencies (dependencies of dependencies), enterprise Symfony applications typically resolve to 100+ total packages:
Dependency Tree Depth:
- Level 1: Direct dependencies (20+ packages)
- Level 2: Dependencies of direct dependencies (40-60 packages)
- Level 3: Third-level dependencies (20-40 packages)
- Level 4+: Deep transitive dependencies (10-20 packages)
Average Dependency Tree: 3-4 levels deep, 100-150 total packages
Security Vulnerability Management
Vulnerability Monitoring Process:
- Automated Scanning: Daily composer audit checks for known CVEs
- Severity Classification: CVSS scoring and exploit availability assessment
- Impact Analysis: Determine if vulnerability affects your specific usage
- Patch Prioritisation: Critical/High/Medium/Low with deployment windows
- Testing and Deployment: Automated tests → staging → production rollout
Security Advisory Sources:
- Symfony Security Advisories (symfony.com/security)
- GitHub Security Advisories (github.com/advisories)
- Packagist Security Monitoring (packagist.org)
- National Vulnerability Database (nvd.nist.gov)
Dependency Update Strategies
Patch/Minor Updates (Low Risk):
- Weekly automated updates
- Automated test suite execution
- Staging deployment with smoke tests
- Production rollout within 48 hours
Major Version Updates (High Risk):
- Quarterly/annual update cycles
- Full regression testing
- Staged rollout with feature flags
- Extended monitoring period
Emergency Security Patches:
- 12-hour emergency deployment window
- Minimal testing (security-critical)
- Immediate staging + production rollout
- Enhanced monitoring post-deployment