Drupal core released an update that fixes three different vulnerabilities on Wednesday, March 15th. In response, Trabian added the update into core that day and developers tested it. The update was rolled out to all of our environments on Friday, March 17th. For more information on the vulnerabilities, you can find links in the release notes here: https://www.drupal.org/project/drupal/releases/9.5.5.
If you have any additional questions, please reach out to your project manager.