Issue with the Sandbox directive on the Content Security Policy rule form has been fixed
Valid from Pega Version 7.2.2
An issue that related to the Sandbox directive not being applied, even after a value in the Content Security Policy rule form was selected, has been fixed. As a result, restrictions that are applied based on the settings in the Sandbox directive are now more closely aligned with the World Wide Web Consortium (W3C) specification than in previous releases. You should test your Content Security Policy to ensure that this change does not cause unexpected behavior in your application, such as making the security policy too restrictive.
New privilege required to access the Search landing page
Valid from Pega Version 7.4
After upgrading to Pega® Platform 7.4, users who do not have the pxAccessSearchLP privilege cannot access the Search landing page. The pxAccessSearchLP privilege is automatically assigned to the SysAdm4 role. If you have other roles that require access to the Search landing page, you must add the pxAccessSearchLP privilege to those roles.
For more information about assigning privileges to roles, see User privilege authorization. (Link to: basics/v6portal/landingpages/accessmanager/customizeprivilegestab.htm)