diff --git a/wp-admin/network/site-new.php b/wp-admin/network/site-new.php
index 2d97c04093..3d226d3a0b 100644
--- a/wp-admin/network/site-new.php
+++ b/wp-admin/network/site-new.php
@@ -83,6 +83,10 @@ if ( isset( $_REQUEST['action'] ) && 'add-site' === $_REQUEST['action'] ) {
 		}
 	}
 
+	if ( empty( $title ) ) {
+		wp_die( __( 'Missing site title.' ) );
+	}
+
 	if ( empty( $domain ) ) {
 		wp_die( __( 'Missing or invalid site address.' ) );
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2d6f5756cb..2fd9094166 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55893';
+$wp_version = '6.3-alpha-55894';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.