diff --git a/app/code/Magento/Catalog/Controller/Adminhtml/Product/NewAction.php b/app/code/Magento/Catalog/Controller/Adminhtml/Product/NewAction.php
index dd55df63c51..81b5d71bff1 100644
--- a/app/code/Magento/Catalog/Controller/Adminhtml/Product/NewAction.php
+++ b/app/code/Magento/Catalog/Controller/Adminhtml/Product/NewAction.php
@@ -68,7 +68,7 @@ public function __construct(
     public function execute()
     {
         $typeId = $this->getRequest()->getParam('type');
-        if (!$this->regexValidator->validateParamRegex($typeId)) {
+        if ($typeId !== null && (!is_string($typeId) || !$this->regexValidator->validateParamRegex($typeId))) {
             return $this->resultForwardFactory->create()->forward('noroute');
         }
 
diff --git a/app/code/Magento/Catalog/Test/Unit/Controller/Adminhtml/Product/NewActionTest.php b/app/code/Magento/Catalog/Test/Unit/Controller/Adminhtml/Product/NewActionTest.php
index 5018f233aab..601c7b9bec6 100755
--- a/app/code/Magento/Catalog/Test/Unit/Controller/Adminhtml/Product/NewActionTest.php
+++ b/app/code/Magento/Catalog/Test/Unit/Controller/Adminhtml/Product/NewActionTest.php
@@ -132,6 +132,36 @@ public function testExecute(string $value, bool $exceptionThrown): void
         }
     }
 
+    /**
+     * Test execute method when the type parameter is absent from the request.
+     */
+    public function testExecuteWithoutTypeParam(): void
+    {
+        $this->action->getRequest()->method('getParam')->willReturn(null);
+        $this->resultForwardFactory->method('create')->willReturn($this->resultForward);
+        $this->resultForward->expects($this->once())
+            ->method('forward')
+            ->with('noroute')
+            ->willReturn(true);
+
+        $this->assertTrue($this->action->execute());
+    }
+
+    /**
+     * Test execute method when the type parameter is not a string.
+     */
+    public function testExecuteWithNonStringTypeParam(): void
+    {
+        $this->action->getRequest()->method('getParam')->willReturn(['simple']);
+        $this->resultForwardFactory->method('create')->willReturn($this->resultForward);
+        $this->resultForward->expects($this->once())
+            ->method('forward')
+            ->with('noroute')
+            ->willReturn(true);
+
+        $this->assertTrue($this->action->execute());
+    }
+
     /**
      * Validation cases.
      *