diff --git a/system/core/Controller.php b/system/core/Controller.php
index 05230e40..20af1df8 100644
--- a/system/core/Controller.php
+++ b/system/core/Controller.php
@@ -49,6 +49,7 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  * @author		EllisLab Dev Team
  * @link		https://codeigniter.com/userguide3/general/controllers.html
  */
+#[AllowDynamicProperties]
 class CI_Controller {
 
 	/**
diff --git a/system/core/Loader.php b/system/core/Loader.php
index d9a1539a..80afffcf 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -48,6 +48,7 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  * @author		EllisLab Dev Team
  * @link		https://codeigniter.com/userguide3/libraries/loader.html
  */
+#[AllowDynamicProperties]
 class CI_Loader {
 
 	// All these are set automatically. Don't mess with them.
diff --git a/system/core/Router.php b/system/core/Router.php
index 0d966255..c2fbb147 100644
--- a/system/core/Router.php
+++ b/system/core/Router.php
@@ -50,6 +50,13 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  */
 class CI_Router {
 
+	/**
+	 * CI_URI class object
+	 *
+	 * @var	object
+	 */
+	public $uri;
+
 	/**
 	 * CI_Config class object
 	 *
diff --git a/system/core/URI.php b/system/core/URI.php
index 9bef22d6..2b664c84 100644
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -50,6 +50,13 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  */
 class CI_URI {
 
+	/**
+	 * CI_Config instance
+	 *
+	 * @var	CI_Config
+	 */
+	public $config;
+
 	/**
 	 * List of cached URI segments
 	 *
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index cba96d9a..95527559 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -50,6 +50,7 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  * @author		EllisLab Dev Team
  * @link		https://codeigniter.com/userguide3/database/
  */
+#[AllowDynamicProperties]
 abstract class CI_DB_driver {
 
 	/**
@@ -825,7 +826,7 @@ abstract class CI_DB_driver {
 	{
 		return $this->_trans_status;
 	}
-	
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/libraries/Profiler.php b/system/libraries/Profiler.php
index 0ef908bc..8560d105 100644
--- a/system/libraries/Profiler.php
+++ b/system/libraries/Profiler.php
@@ -52,6 +52,7 @@ defined('BASEPATH') OR exit('No direct script access allowed');
  * @author		EllisLab Dev Team
  * @link		https://codeigniter.com/userguide3/general/profiling.html
  */
+#[AllowDynamicProperties]
 class CI_Profiler {
 
 	/**