diff --git a/wp-includes/user.php b/wp-includes/user.php
index 3a11fa10bf..81944eda0e 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -2043,6 +2043,10 @@ function wp_insert_user( $userdata ) {
 	 */
 	$user_url = apply_filters( 'pre_user_url', $raw_user_url );
 
+	if ( mb_strlen( $user_url ) > 100 ) {
+		return new WP_Error( 'user_url_too_long', __( 'User URL may not be longer than 100 characters.' ) );
+	}
+
 	$user_registered = empty( $userdata['user_registered'] ) ? gmdate( 'Y-m-d H:i:s' ) : $userdata['user_registered'];
 
 	$user_activation_key = empty( $userdata['user_activation_key'] ) ? '' : $userdata['user_activation_key'];
diff --git a/wp-includes/version.php b/wp-includes/version.php
index cc2124eee6..8f8e5f22d0 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52649';
+$wp_version = '6.0-alpha-52650';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.