diff --git a/typo3/sysext/core/Documentation/Changelog/master/Deprecation-94367-ExtbaseReferringRequest.rst b/typo3/sysext/core/Documentation/Changelog/master/Deprecation-94367-ExtbaseReferringRequest.rst
new file mode 100644
index 000000000000..aedfa26853f6
--- /dev/null
+++ b/typo3/sysext/core/Documentation/Changelog/master/Deprecation-94367-ExtbaseReferringRequest.rst
@@ -0,0 +1,37 @@
+.. include:: ../../Includes.txt
+
+==============================================
+Deprecation: #94367 - extbase ReferringRequest
+==============================================
+
+See :issue:`94367`
+
+Description
+===========
+
+To further prepare extbase towards PSR-7 compatible requests, extbase class
+:php:`TYPO3\CMS\Extbase\Mvc\Web\ReferringRequest` has been deprecated.
+
+
+Impact
+======
+
+Creating an instance of :php:`ReferringRequest` will trigger a PHP deprecation warning.
+
+
+Affected Installations
+======================
+
+:php:`ReferringRequest` has been mostly extbase internal and rarely used in
+extbase extensions, probably only in cases where
+:php:`ActionController->forwardToReferringRequest()` is overridden.
+The extension scanner will find usages with a strong match.
+
+Migration
+=========
+
+Extbase internally, :php:`ReferringRequest` has only been used to
+immediately create a :php:`ForwardResponse` from it. Consuming extensions
+should follow his approach and create a :php:`ForwardResponse` directly.
+
+.. index:: PHP-API, FullyScanned, ext:extbase
diff --git a/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php b/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php
index 46cfa6e8b75c..08c88348a1c9 100644
--- a/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php
+++ b/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php
@@ -30,10 +30,12 @@
 use TYPO3\CMS\Core\Page\PageRenderer;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Core\Utility\MathUtility;
+use TYPO3\CMS\Core\Utility\StringUtility;
 use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
 use TYPO3\CMS\Extbase\Event\Mvc\BeforeActionCallEvent;
 use TYPO3\CMS\Extbase\Http\ForwardResponse;
 use TYPO3\CMS\Extbase\Mvc\Controller\Exception\RequiredArgumentMissingException;
+use TYPO3\CMS\Extbase\Mvc\Exception\InvalidArgumentNameException;
 use TYPO3\CMS\Extbase\Mvc\Exception\InvalidArgumentTypeException;
 use TYPO3\CMS\Extbase\Mvc\Exception\NoSuchActionException;
 use TYPO3\CMS\Extbase\Mvc\Exception\StopActionException;
@@ -43,7 +45,6 @@
 use TYPO3\CMS\Extbase\Mvc\View\NotFoundView;
 use TYPO3\CMS\Extbase\Mvc\View\ViewInterface;
 use TYPO3\CMS\Extbase\Mvc\View\ViewResolverInterface;
-use TYPO3\CMS\Extbase\Mvc\Web\ReferringRequest;
 use TYPO3\CMS\Extbase\Mvc\Web\Routing\UriBuilder;
 use TYPO3\CMS\Extbase\Object\ObjectManagerInterface;
 use TYPO3\CMS\Extbase\Property\Exception\TargetNotFoundException;
@@ -795,20 +796,25 @@ protected function forwardToReferringRequest(): ?ResponseInterface
                     base64_decode($this->hashService->validateAndStripHmac($referringRequestArguments['arguments']))
                 );
             }
-            // todo: Remove ReferringRequest. It's only used here in this context to trigger the logic of
-            //       \TYPO3\CMS\Extbase\Mvc\Web\ReferringRequest::setArgument() and its parent method which should then
-            //       be extracted from the request class.
-            $referringRequest = new ReferringRequest();
-            $referringRequest->setArguments(array_replace_recursive($arguments, $referrerArray));
-        }
-
-        if ($referringRequest !== null) {
-            return (new ForwardResponse((string)$referringRequest->getControllerActionName()))
-                ->withControllerName((string)$referringRequest->getControllerName())
-                ->withExtensionName((string)$referringRequest->getControllerExtensionName())
-                ->withArguments($referringRequest->getArguments())
-                ->withArgumentsValidationResult($this->arguments->validate())
-            ;
+            $replacedArguments = array_replace_recursive($arguments, $referrerArray);
+            $nonExtbaseBaseArguments = [];
+            foreach ($replacedArguments as $argumentName => $argumentValue) {
+                if (!is_string($argumentName) || $argumentName === '') {
+                    throw new InvalidArgumentNameException('Invalid argument name.', 1623940985);
+                }
+                if (StringUtility::beginsWith($argumentName, '__')
+                    || in_array($argumentName, ['@extension', '@subpackage', '@controller', '@action', '@format'], true)
+                ) {
+                    // Don't handle internalArguments here, not needed for forwardResponse()
+                    continue;
+                }
+                $nonExtbaseBaseArguments[$argumentName] = $argumentValue;
+            }
+            return (new ForwardResponse((string)($replacedArguments['@action'] ?? 'index')))
+                ->withControllerName((string)($replacedArguments['@controller'] ?? 'Standard'))
+                ->withExtensionName((string)($replacedArguments['@extension'] ?? ''))
+                ->withArguments($nonExtbaseBaseArguments)
+                ->withArgumentsValidationResult($this->arguments->validate());
         }
 
         return null;
diff --git a/typo3/sysext/extbase/Classes/Mvc/Controller/Arguments.php b/typo3/sysext/extbase/Classes/Mvc/Controller/Arguments.php
index e58ad7fc1f73..ce0edd4ce9b5 100644
--- a/typo3/sysext/extbase/Classes/Mvc/Controller/Arguments.php
+++ b/typo3/sysext/extbase/Classes/Mvc/Controller/Arguments.php
@@ -274,6 +274,7 @@ public function validate(): Result
         foreach ($this as $argument) {
             $argumentValidationResults = $argument->validate();
             if ($argumentValidationResults === null) {
+                // @todo: Obsolete?! "validate(): Result", can't be null!
                 continue;
             }
             $results->forProperty($argument->getName())->merge($argumentValidationResults);
diff --git a/typo3/sysext/extbase/Classes/Mvc/Web/ReferringRequest.php b/typo3/sysext/extbase/Classes/Mvc/Web/ReferringRequest.php
index d8e06f47d02e..19d78222d88e 100644
--- a/typo3/sysext/extbase/Classes/Mvc/Web/ReferringRequest.php
+++ b/typo3/sysext/extbase/Classes/Mvc/Web/ReferringRequest.php
@@ -19,9 +19,21 @@
 
 /**
  * Represents a referring web request.
+ *
+ * @deprecated since v11, will be removed in v12. Create a ForwardResponse instead, see ActionController->forwardToReferringRequest()
  */
 class ReferringRequest extends Request
 {
+    /**
+     * @param string $controllerClassName
+     */
+    public function __construct(string $controllerClassName = '')
+    {
+        // @todo: Move to parent::__construct() in case Request is deprecated in v11, too, otherwise drop this todo.
+        trigger_error(__CLASS__ . ' will be removed in TYPO3 v12, use ForwardResponse instead, see ActionController->forwardToReferringRequest().', E_USER_DEPRECATED);
+        parent::__construct($controllerClassName);
+    }
+
     /**
      * Sets the value of the specified argument
      *
diff --git a/typo3/sysext/install/Configuration/ExtensionScanner/Php/ClassNameMatcher.php b/typo3/sysext/install/Configuration/ExtensionScanner/Php/ClassNameMatcher.php
index 9a95fd5944bc..6f9dde682cf5 100644
--- a/typo3/sysext/install/Configuration/ExtensionScanner/Php/ClassNameMatcher.php
+++ b/typo3/sysext/install/Configuration/ExtensionScanner/Php/ClassNameMatcher.php
@@ -1664,4 +1664,9 @@
             'Deprecation-94313-ClassAbstractService.rst'
        ],
     ],
+    'TYPO3\CMS\Extbase\Mvc\Web\ReferringRequest' => [
+        'restFiles' => [
+            'Deprecation-94367-ExtbaseReferringRequest.rst'
+        ],
+    ],
 ];