Drupal Portal Cloud Release 19.04.18.00 has been released, which contain security fixes for Drupal core and two contrib modules.
The release notes are available here: http://docs.apigee.com/release-notes/content/apigee-release-notes
For Apigee Cloud customers -
Cloud customers hosted on Pantheon should apply updates to their site using the Pantheon dashboard: http://apigee.com/docs/developer-services/content/working-pantheon#maintainyoursite-applyanapigeeupdatetothedeveloperservicesportal
and make sure all environments have been patched using the standard workflow: http://helpdesk.getpantheon.com/customer/portal/articles/383609-using-the-pantheon-workflow
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