diff --git a/package-lock.json b/package-lock.json
index 4906648085f9d..c5c985d2137f4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -98,7 +98,7 @@
 				"react-is": "18.3.1",
 				"regenerator-runtime": "0.14.1",
 				"underscore": "1.13.6",
-				"whatwg-fetch": "3.6.17",
+				"whatwg-fetch": "3.6.20",
 				"wicg-inert": "3.1.2"
 			},
 			"devDependencies": {
@@ -33887,9 +33887,9 @@
 			}
 		},
 		"node_modules/whatwg-fetch": {
-			"version": "3.6.17",
-			"resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.17.tgz",
-			"integrity": "sha512-c4ghIvG6th0eudYwKZY5keb81wtFz9/WeAHAoy8+r18kcWlitUIrmGFQ2rWEl4UCKUilD3zCLHOIPheHx5ypRQ=="
+			"version": "3.6.20",
+			"resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.20.tgz",
+			"integrity": "sha512-EqhiFU6daOA8kpjOWTL0olhVOF3i7OrFzSYiGsEMB8GcXS+RrzauAERX65xMeNWVqxA6HXH2m69Z9LaKKdisfg=="
 		},
 		"node_modules/whatwg-mimetype": {
 			"version": "3.0.0",
@@ -59511,9 +59511,9 @@
 			}
 		},
 		"whatwg-fetch": {
-			"version": "3.6.17",
-			"resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.17.tgz",
-			"integrity": "sha512-c4ghIvG6th0eudYwKZY5keb81wtFz9/WeAHAoy8+r18kcWlitUIrmGFQ2rWEl4UCKUilD3zCLHOIPheHx5ypRQ=="
+			"version": "3.6.20",
+			"resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.20.tgz",
+			"integrity": "sha512-EqhiFU6daOA8kpjOWTL0olhVOF3i7OrFzSYiGsEMB8GcXS+RrzauAERX65xMeNWVqxA6HXH2m69Z9LaKKdisfg=="
 		},
 		"whatwg-mimetype": {
 			"version": "3.0.0",
diff --git a/package.json b/package.json
index 06fcc6829a8eb..7c55cb8bc1278 100644
--- a/package.json
+++ b/package.json
@@ -167,7 +167,7 @@
 		"react-is": "18.3.1",
 		"regenerator-runtime": "0.14.1",
 		"underscore": "1.13.6",
-		"whatwg-fetch": "3.6.17",
+		"whatwg-fetch": "3.6.20",
 		"wicg-inert": "3.1.2"
 	},
 	"scripts": {
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 121adc646e0ad..24a35a291911e 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -114,7 +114,7 @@ function wp_default_packages_vendor( $scripts ) {
 		'regenerator-runtime'         => '0.14.1',
 		'moment'                      => '2.29.4',
 		'lodash'                      => '4.17.21',
-		'wp-polyfill-fetch'           => '3.6.17',
+		'wp-polyfill-fetch'           => '3.6.20',
 		'wp-polyfill-formdata'        => '4.0.10',
 		'wp-polyfill-node-contains'   => '4.8.0',
 		'wp-polyfill-url'             => '3.6.4',