Prevent injection of invalid entity ids for "autocomplete" fields
Impact Under certain circumstances, an attacker could successfully submit an entity id for an EntityType that is not part of the valid choices. Affected applications are any that use: A custom query_builder option to limit the valid results; AND An EntityType with 'autocomplete' => true or a custom AsEntityAutocompleteField. Under this circumstance, if an id is submitted, it is accepted even if the matching record would not be returned by …