diff --git a/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php b/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
index f8ec05fbbbcbde44f6d21c9af57cc4685827d175..75dfc46ee5a05922550e9a4b31821381917f165d 100644
--- a/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
+++ b/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
@@ -25,6 +25,7 @@
  * @private
  * @subpackage DifferenceEngine
  */
+#[\AllowDynamicProperties]
 class DiffEngine {
 
   const USE_ASSERTS = FALSE;
diff --git a/core/lib/Drupal/Component/Plugin/Definition/PluginDefinition.php b/core/lib/Drupal/Component/Plugin/Definition/PluginDefinition.php
index ed1ac91c2f12cf0203b76392870d06ce8d4cce9a..fd570872c27796d80ec8df48a433d795d28b0849 100644
--- a/core/lib/Drupal/Component/Plugin/Definition/PluginDefinition.php
+++ b/core/lib/Drupal/Component/Plugin/Definition/PluginDefinition.php
@@ -5,6 +5,7 @@
 /**
  * Provides object-based plugin definitions.
  */
+#[\AllowDynamicProperties]
 class PluginDefinition implements PluginDefinitionInterface {
 
   /**
diff --git a/core/lib/Drupal/Core/Session/UserSession.php b/core/lib/Drupal/Core/Session/UserSession.php
index 5ed8e4c724cad1a563da510608e84745ec6f9f87..372c8a9580f97b993a65669b94dfa066c3f02cde 100644
--- a/core/lib/Drupal/Core/Session/UserSession.php
+++ b/core/lib/Drupal/Core/Session/UserSession.php
@@ -7,6 +7,7 @@
  *
  * @todo: Change all properties to protected.
  */
+#[\AllowDynamicProperties]
 class UserSession implements AccountInterface {
 
   /**
diff --git a/core/modules/migrate/src/Plugin/Migration.php b/core/modules/migrate/src/Plugin/Migration.php
index 01ae6aea583cdc88237ff845f47b964374eef632..8e3b3eac0a0ae8ffe46656f50ad0edcb3b66252d 100644
--- a/core/modules/migrate/src/Plugin/Migration.php
+++ b/core/modules/migrate/src/Plugin/Migration.php
@@ -95,6 +95,7 @@
  *
  * @link https://www.drupal.org/docs/8/api/migrate-api Migrate API handbook. @endlink
  */
+#[\AllowDynamicProperties]
 class Migration extends PluginBase implements MigrationInterface, RequirementsInterface, ContainerFactoryPluginInterface {
 
   /**
diff --git a/core/modules/views/src/ViewExecutable.php b/core/modules/views/src/ViewExecutable.php
index 77165e691ca6423b849c69ffe5cf6ce61d64a3f7..0b1849fa4b349a429c1082428a15376d633e8191 100644
--- a/core/modules/views/src/ViewExecutable.php
+++ b/core/modules/views/src/ViewExecutable.php
@@ -24,6 +24,7 @@
  * @see https://www.drupal.org/node/2849674
  * @see https://bugs.php.net/bug.php?id=66052
  */
+#[\AllowDynamicProperties]
 class ViewExecutable {
 
   /**
diff --git a/core/modules/views_ui/src/ViewUI.php b/core/modules/views_ui/src/ViewUI.php
index f7646231a20472cc12d4404119dd83ce7b039eb7..30dc3edba53e2c8f0e743f9b72abbb1718a90020 100644
--- a/core/modules/views_ui/src/ViewUI.php
+++ b/core/modules/views_ui/src/ViewUI.php
@@ -23,6 +23,7 @@
 /**
  * Stores UI related temporary settings.
  */
+#[\AllowDynamicProperties]
 class ViewUI implements ViewEntityInterface {
 
   /**