Index: wp-includes/script-loader.php
===================================================================
--- wp-includes/script-loader.php	(revision 45045)
+++ wp-includes/script-loader.php	(working copy)
@@ -1184,8 +1184,8 @@
 
 	$scripts->add( 'imgareaselect', "/wp-includes/js/imgareaselect/jquery.imgareaselect$suffix.js", array( 'jquery' ), false, 1 );
 
-	$scripts->add( 'mediaelement', false, array( 'jquery', 'mediaelement-core', 'mediaelement-migrate' ), '4.2.6-78496d1' );
-	$scripts->add( 'mediaelement-core', "/wp-includes/js/mediaelement/mediaelement-and-player$suffix.js", array(), '4.2.6-78496d1', 1 );
+	$scripts->add( 'mediaelement', false, array( 'jquery', 'mediaelement-core', 'mediaelement-migrate' ), '4.2.9-a6cc75b' );
+	$scripts->add( 'mediaelement-core', "/wp-includes/js/mediaelement/mediaelement-and-player$suffix.js", array(), '4.2.9-a6cc75b', 1 );
 	$scripts->add( 'mediaelement-migrate', "/wp-includes/js/mediaelement/mediaelement-migrate$suffix.js", array(), false, 1 );
 
 	did_action( 'init' ) && $scripts->add_inline_script(
@@ -1287,7 +1287,7 @@
 		'before'
 	);
 
-	$scripts->add( 'mediaelement-vimeo', '/wp-includes/js/mediaelement/renderers/vimeo.min.js', array( 'mediaelement' ), '4.2.6-78496d1', 1 );
+	$scripts->add( 'mediaelement-vimeo', '/wp-includes/js/mediaelement/renderers/vimeo.min.js', array( 'mediaelement' ), '4.2.9-a6cc75b', 1 );
 	$scripts->add( 'wp-mediaelement', "/wp-includes/js/mediaelement/wp-mediaelement$suffix.js", array( 'mediaelement' ), false, 1 );
 	$mejs_settings = array(
 		'pluginPath'  => includes_url( 'js/mediaelement/', 'relative' ),
@@ -1968,7 +1968,7 @@
 	// External libraries and friends
 	$styles->add( 'imgareaselect', '/wp-includes/js/imgareaselect/imgareaselect.css', array(), '0.9.8' );
 	$styles->add( 'wp-jquery-ui-dialog', "/wp-includes/css/jquery-ui-dialog$suffix.css", array( 'dashicons' ) );
-	$styles->add( 'mediaelement', '/wp-includes/js/mediaelement/mediaelementplayer-legacy.min.css', array(), '4.2.6-78496d1' );
+	$styles->add( 'mediaelement', '/wp-includes/js/mediaelement/mediaelementplayer-legacy.min.css', array(), '4.2.9-a6cc75b' );
 	$styles->add( 'wp-mediaelement', "/wp-includes/js/mediaelement/wp-mediaelement$suffix.css", array( 'mediaelement' ) );
 	$styles->add( 'thickbox', '/wp-includes/js/thickbox/thickbox.css', array( 'dashicons' ) );
 	$styles->add( 'wp-codemirror', '/wp-includes/js/codemirror/codemirror.min.css', array(), '5.29.1-alpha-ee20357' );