The Drupal Security Team just released an PSA (Public Service Announcement) regarding a Drupal 7 and 8 core highly critical release on March 28th: https://www.drupal.org/psa-2018-001
The security release is scheduled to be released on March 28th 2018 18:00 - 19:30 UTC.
We will investigate a platform wide temporary mitigation as soon as the security fix has been released and more information is known. At this time it is not possible to say if a platform wide mitigation is possible. We will keep you up to date.
*We suggest all our clients to prepare to update their Drupal sites within a couple of hours after the release.*