diff -u b/core/lib/Drupal/Component/PhpStorage/FileStorage.php b/core/lib/Drupal/Component/PhpStorage/FileStorage.php --- b/core/lib/Drupal/Component/PhpStorage/FileStorage.php +++ b/core/lib/Drupal/Component/PhpStorage/FileStorage.php @@ -70,7 +70,7 @@ if (!file_exists($dir)) { $mode = static::directoryMode; if (static::umask) { - $mode = $mode & umask(); + $mode = $mode & ~umask(); } mkdir($dir, $mode, TRUE); }