AC-7025 - Sanitize input handler parameter

Author: Devika-GL

app/code/Magento/Catalog/Controller/Adminhtml/Product/NewAction.php

@@ -35,7 +35,7 @@ class NewAction extends \Magento\Catalog\Controller\Adminhtml\Product implements
     /**
      * @var RegexValidator
      */
-    public RegexValidator $regexValidator;
+    private RegexValidator $regexValidator;
 
     /**
      * @param Context $context

app/code/Magento/Catalog/Test/Unit/Controller/Adminhtml/Product/NewActionTest.php

@@ -144,7 +144,7 @@ public function testExecute(string $value, bool $exceptionThrown): void
                 ->with($value)
                 ->willReturn(true);
 
-            $this->assertEquals(true, $this->action->regexValidator->validateParamRegex($value));
+            $this->assertEquals(true, $this->regexValidator->validateParamRegex($value));
         }
     }
 

lib/internal/Magento/Framework/RegexValidator.php

@@ -40,7 +40,7 @@ public function __construct(
      * @param string $pattern
      * @return bool
      */
-    public function validateParamRegex($params, $pattern = self::VALIDATION_RULE_PATTERN)
+    public function validateParamRegex(string $params, string $pattern = self::VALIDATION_RULE_PATTERN): bool
     {
         $validator = $this->regexValidatorFactory->create(['pattern' => $pattern]);