Yes. symfony/security (Packagist): upgrade to 2.7.50 or later; symfony/security-http (Packagist): upgrade to 2.7.50 or later; symfony/symfony (Packagist): upgrade to 2.7.50 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2018-19790?
Check whether you run symfony/security (Packagist), symfony/security-http (Packagist) or symfony/symfony (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
symfony/security (Packagist): upgrade to 2.7.50 or later
composer require symfony/security:^2.7.50
symfony/security-http (Packagist): upgrade to 2.7.50 or later
composer require symfony/security-http:^2.7.50
symfony/symfony (Packagist): upgrade to 2.7.50 or later