diff --git a/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js b/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js
index 4d1eb6c475..84170dbe73 100644
--- a/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js
+++ b/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js
@@ -1,20 +1,20 @@
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+function n(a){a=["object"==typeof globalThis&&globalThis,a,"object"==typeof window&&window,"object"==typeof self&&self,"object"==typeof global&&global];for(var c=0;c<a.length;++c){var b=a[c];if(b&&b.Math==Math)return b}throw Error("Cannot find global object");}var p=n(this);function r(a,c){if(c)a:{for(var b=p,d=a.split("."),e=0;e<d.length-1;e++){var f=d[e];if(!(f in b))break a;b=b[f]}d=d[d.length-1];e=b[d];f=c(e);f!=e&&null!=f&&m(b,d,{configurable:!0,writable:!0,value:f})}}
+r("Symbol",function(a){function c(f){if(this instanceof c)throw new TypeError("Symbol is not a constructor");return new b(d+(f||"")+"_"+e++,f)}function b(f,g){this.A=f;m(this,"description",{configurable:!0,writable:!0,value:g})}if(a)return a;b.prototype.toString=function(){return this.A};var d="jscomp_symbol_"+(1E9*Math.random()>>>0)+"_",e=0;return c});
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diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 5706352e36..129cbd2b31 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -108,8 +108,8 @@ function wp_default_packages_vendor( $scripts ) {
 		'moment'                      => '2.29.1',
 		'lodash'                      => '4.17.19',
 		'wp-polyfill-fetch'           => '3.0.0',
-		'wp-polyfill-formdata'        => '3.0.20',
-		'wp-polyfill-node-contains'   => '3.104.0',
+		'wp-polyfill-formdata'        => '4.0.0',
+		'wp-polyfill-node-contains'   => '3.105.0',
 		'wp-polyfill-url'             => '3.6.4',
 		'wp-polyfill-dom-rect'        => '3.104.0',
 		'wp-polyfill-element-closest' => '2.0.2',
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b70a477e44..49154780e7 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-51016';
+$wp_version = '5.8-alpha-51017';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.