diff --git a/src/Symfony/Component/Security/Http/Authenticator/RememberMeAuthenticator.php b/src/Symfony/Component/Security/Http/Authenticator/RememberMeAuthenticator.php
index a7d7f01a4df52..f2571baac81f4 100644
--- a/src/Symfony/Component/Security/Http/Authenticator/RememberMeAuthenticator.php
+++ b/src/Symfony/Component/Security/Http/Authenticator/RememberMeAuthenticator.php
@@ -70,7 +70,7 @@ public function supports(Request $request): ?bool
             return false;
         }
 
-        if (!$request->cookies->has($this->cookieName)) {
+        if (!$request->cookies->has($this->cookieName) || !\is_scalar($request->cookies->all()[$this->cookieName] ?: null)) {
             return false;
         }
 
diff --git a/src/Symfony/Component/Security/Http/Tests/Authenticator/RememberMeAuthenticatorTest.php b/src/Symfony/Component/Security/Http/Tests/Authenticator/RememberMeAuthenticatorTest.php
index 302def675391b..55bdba53988b2 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authenticator/RememberMeAuthenticatorTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authenticator/RememberMeAuthenticatorTest.php
@@ -61,6 +61,9 @@ public static function provideSupportsData()
         $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => 'rememberme']);
         $request->attributes->set(ResponseListener::COOKIE_ATTR_NAME, new Cookie('_remember_me_cookie', null));
         yield [$request, false];
+
+        $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => '0']);
+        yield [$request, false];
     }
 
     public function testAuthenticate()