diff --git a/wp-includes/version.php b/wp-includes/version.php
index 688cc38818..20d8b6e97c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-58092';
+$wp_version = '6.6-alpha-58093';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-login.php b/wp-login.php
index bd4568a469..18811aae57 100644
--- a/wp-login.php
+++ b/wp-login.php
@@ -753,7 +753,7 @@ switch ( $action ) {
 		break;
 
 	case 'postpass':
-		if ( ! array_key_exists( 'post_password', $_POST ) ) {
+		if ( ! isset( $_POST['post_password'] ) || ! is_string( $_POST['post_password'] ) ) {
 			wp_safe_redirect( wp_get_referer() );
 			exit;
 		}