Cover of the book Symfony 5: The Fast Track

Symfony 5: The Fast Track is the best book to learn modern Symfony development, from zero to production. +300 pages showcasing Symfony with Docker, APIs, queues & async tasks, Webpack, SPAs, etc.

WARNING: You are browsing the documentation for Symfony 2.8 which is not maintained anymore. Consider upgrading your projects to Symfony 5.1.

How to Check for Known Security Vulnerabilities in Your Dependencies

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How to Check for Known Security Vulnerabilities in Your Dependencies

When using lots of dependencies in your Symfony projects, some of them may contain security vulnerabilities. That’s why Symfony includes a command called security:check that checks your composer.lock file to find any known security vulnerability in your installed dependencies:

$ php app/console security:check

A good security practice is to execute this command regularly to be able to update or replace compromised dependencies as soon as possible. Internally, this command uses the public security advisories database published by the FriendsOfPHP organization.


The security:check command terminates with a non-zero exit code if any of your dependencies is affected by a known security vulnerability. This allows you to add it to your project build process and your continuous integration workflows.


To enable the security:check command, make sure the SensioDistributionBundle is installed and enabled in your application.


The security checker is also available as an independent console application and distributed as a PHAR file so you can use it in any PHP application. Check out the Security Checker repository for more details.

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