diff --git a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
index 19566e9aa7..2ebdbda090 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
@@ -634,14 +634,13 @@ $imports
 EOF
         ;
 
-        if (\LIBXML_VERSION < 20900) {
+        if ($this->shouldEnableEntityLoader()) {
             $disableEntities = libxml_disable_entity_loader(false);
             $valid = @$dom->schemaValidateSource($source);
             libxml_disable_entity_loader($disableEntities);
         } else {
             $valid = @$dom->schemaValidateSource($source);
         }
-
         foreach ($tmpfiles as $tmpfile) {
             @unlink($tmpfile);
         }
@@ -649,6 +648,36 @@ EOF
         return $valid;
     }
 
+    private function shouldEnableEntityLoader(): bool
+    {
+        // Version prior to 8.0 can be enabled without deprecation
+        if (\PHP_VERSION_ID < 80000) {
+            return true;
+        }
+
+        static $dom, $schema;
+        if (null === $dom) {
+            $dom = new \DOMDocument();
+            $dom->loadXML('<?xml version="1.0"?><test/>');
+
+            $tmpfile = tempnam(sys_get_temp_dir(), 'symfony');
+            register_shutdown_function(static function () use ($tmpfile) {
+                @unlink($tmpfile);
+            });
+            $schema = '<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <xsd:include schemaLocation="file:///'.str_replace('\\', '/', $tmpfile).'" />
+</xsd:schema>';
+            file_put_contents($tmpfile, '<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <xsd:element name="test" type="testType" />
+  <xsd:complexType name="testType"/>
+</xsd:schema>');
+        }
+
+        return !@$dom->schemaValidateSource($schema);
+    }
+
     private function validateAlias(\DOMElement $alias, string $file)
     {
         foreach ($alias->attributes as $name => $node) {
diff --git a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
index 53b2cee448..5a9669e92b 100644
--- a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
@@ -29,6 +29,21 @@ class TranslationFilesTest extends TestCase
         $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
+    /**
+     * @dataProvider provideTranslationFiles
+     * @group Legacy
+     */
+    public function testTranslationFileIsValidWithoutEntityLoader($filePath)
+    {
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
+        libxml_disable_entity_loader(true);
+
+        $errors = XliffUtils::validateSchema($document);
+
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
+    }
+
     public function provideTranslationFiles()
     {
         return array_map(
diff --git a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
index 2402b01998..4255e91d92 100644
--- a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
@@ -29,6 +29,20 @@ class TranslationFilesTest extends TestCase
         $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
+    /**
+     * @dataProvider provideTranslationFiles
+     */
+    public function testTranslationFileIsValidWithoutEntityLoader($filePath)
+    {
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
+        libxml_disable_entity_loader(true);
+
+        $errors = XliffUtils::validateSchema($document);
+
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
+    }
+
     public function provideTranslationFiles()
     {
         return array_map(
diff --git a/src/Symfony/Component/Translation/Util/XliffUtils.php b/src/Symfony/Component/Translation/Util/XliffUtils.php
index a8c05c2244..e4373a7d5b 100644
--- a/src/Symfony/Component/Translation/Util/XliffUtils.php
+++ b/src/Symfony/Component/Translation/Util/XliffUtils.php
@@ -61,21 +61,18 @@ class XliffUtils
     {
         $xliffVersion = static::getVersionNumber($dom);
         $internalErrors = libxml_use_internal_errors(true);
-        if (\LIBXML_VERSION < 20900) {
+        if ($shouldEnable = self::shouldEnableEntityLoader()) {
             $disableEntities = libxml_disable_entity_loader(false);
         }
-
-        $isValid = @$dom->schemaValidateSource(self::getSchema($xliffVersion));
-        if (!$isValid) {
-            if (\LIBXML_VERSION < 20900) {
+        try {
+            $isValid = @$dom->schemaValidateSource(self::getSchema($xliffVersion));
+            if (!$isValid) {
+                return self::getXmlErrors($internalErrors);
+            }
+        } finally {
+            if ($shouldEnable) {
                 libxml_disable_entity_loader($disableEntities);
             }
-
-            return self::getXmlErrors($internalErrors);
-        }
-
-        if (\LIBXML_VERSION < 20900) {
-            libxml_disable_entity_loader($disableEntities);
         }
 
         $dom->normalizeDocument();
@@ -86,6 +83,36 @@ class XliffUtils
         return [];
     }
 
+    private static function shouldEnableEntityLoader(): bool
+    {
+        // Version prior to 8.0 can be enabled without deprecation
+        if (\PHP_VERSION_ID < 80000) {
+            return true;
+        }
+
+        static $dom, $schema;
+        if (null === $dom) {
+            $dom = new \DOMDocument();
+            $dom->loadXML('<?xml version="1.0"?><test/>');
+
+            $tmpfile = tempnam(sys_get_temp_dir(), 'symfony');
+            register_shutdown_function(static function () use ($tmpfile) {
+                @unlink($tmpfile);
+            });
+            $schema = '<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <xsd:include schemaLocation="file:///'.str_replace('\\', '/', $tmpfile).'" />
+</xsd:schema>';
+            file_put_contents($tmpfile, '<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <xsd:element name="test" type="testType" />
+  <xsd:complexType name="testType"/>
+</xsd:schema>');
+        }
+
+        return !@$dom->schemaValidateSource($schema);
+    }
+
     public static function getErrorsAsString(array $xmlErrors): string
     {
         $errorsAsString = '';
diff --git a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
index 894ae55f10..6e0620b517 100644
--- a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
@@ -29,6 +29,20 @@ class TranslationFilesTest extends TestCase
         $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
     }
 
+    /**
+     * @dataProvider provideTranslationFiles
+     */
+    public function testTranslationFileIsValidWithoutEntityLoader($filePath)
+    {
+        $document = new \DOMDocument();
+        $document->loadXML(file_get_contents($filePath));
+        libxml_disable_entity_loader(true);
+
+        $errors = XliffUtils::validateSchema($document);
+
+        $this->assertCount(0, $errors, sprintf('"%s" is invalid:%s', $filePath, \PHP_EOL.implode(\PHP_EOL, array_column($errors, 'message'))));
+    }
+
     public function provideTranslationFiles()
     {
         return array_map(