diff --git a/plugins/woocommerce/changelog/add-order-attribution-base64-encoding-cookies b/plugins/woocommerce/changelog/add-order-attribution-base64-encoding-cookies
new file mode 100644
index 00000000000..f38060060fa
--- /dev/null
+++ b/plugins/woocommerce/changelog/add-order-attribution-base64-encoding-cookies
@@ -0,0 +1,4 @@
+Significance: minor
+Type: add
+
+Filter to apply Base64 encoding to order attribution cookies
diff --git a/plugins/woocommerce/client/legacy/js/frontend/order-attribution.js b/plugins/woocommerce/client/legacy/js/frontend/order-attribution.js
index 9dad4dc842c..08dee73bd9b 100644
--- a/plugins/woocommerce/client/legacy/js/frontend/order-attribution.js
+++ b/plugins/woocommerce/client/legacy/js/frontend/order-attribution.js
@@ -82,6 +82,7 @@
 			sbjs.init( {
 				lifetime: Number( params.lifetime ),
 				session_length: Number( params.session ),
+				base64: Boolean( params.base64 ),
 				timezone_offset: '0', // utc
 			} );
 		}
@@ -184,7 +185,10 @@
 					if( input ) {
 						input.value = stringifyFalsyInputValue( this.values[ fieldName ] );
 					} else {
-						console.warn( `Field "${fieldName}" not found. Most likely, the '<wc-order-attribution-inputs>' element was manipulated.`);
+						console.warn(
+							`Field "${fieldName}" not found. ` +
+							`Most likely, the '<wc-order-attribution-inputs>' element was manipulated.`
+						);
 					}
 				}
 			}
diff --git a/plugins/woocommerce/client/legacy/package.json b/plugins/woocommerce/client/legacy/package.json
index b7b31847afc..a8b96931165 100644
--- a/plugins/woocommerce/client/legacy/package.json
+++ b/plugins/woocommerce/client/legacy/package.json
@@ -42,7 +42,7 @@
 		"wireit": "0.14.3"
 	},
 	"dependencies": {
-		"sourcebuster": "github:woocommerce/sourcebuster-js#v1.1.2"
+		"sourcebuster": "github:woocommerce/sourcebuster-js#v1.2.0"
 	},
 	"wireit": {
 		"build:project:assets": {
diff --git a/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php b/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
index 9aa0f137e7a..7ad08759562 100644
--- a/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
+++ b/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
@@ -288,6 +288,15 @@ class OrderAttributionController implements RegisterHooksInterface {
 		 */
 		$session_length = (int) apply_filters( 'wc_order_attribution_session_length_minutes', 30 );
 
+		/**
+		 * Filter to enable base64 encoding for cookie values.
+		 *
+		 * @since 9.0.0
+		 *
+		 * @param bool $use_base64_cookies True to enable base64 encoding, default is false.
+		 */
+		$use_base64_cookies = apply_filters( 'wc_order_attribution_use_base64_cookies', false );
+
 		/**
 		 * Filter to allow tracking.
 		 *
@@ -302,6 +311,7 @@ class OrderAttributionController implements RegisterHooksInterface {
 			'params' => array(
 				'lifetime'      => $lifetime,
 				'session'       => $session_length,
+				'base64'        => $use_base64_cookies,
 				'ajaxurl'       => admin_url( 'admin-ajax.php' ),
 				'prefix'        => $this->field_prefix,
 				'allowTracking' => 'yes' === $allow_tracking,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1390c775e0e..99efb52ac86 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -4495,8 +4495,8 @@ importers:
   plugins/woocommerce/client/legacy:
     dependencies:
       sourcebuster:
-        specifier: github:woocommerce/sourcebuster-js#v1.1.2
-        version: https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/411d8dffaa37d7602d678c2ec02baacee93c12d5
+        specifier: github:woocommerce/sourcebuster-js#v1.2.0
+        version: https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/d7f4616d5a17e17db925ca1842457f309379d861
     devDependencies:
       '@types/node':
         specifier: ^16.18.68
@@ -22426,8 +22426,8 @@ packages:
     resolution: {integrity: sha512-l3BikUxvPOcn5E74dZiq5BGsTb5yEwhaTSzccU6t4sDOH8NWJCstKO5QT2CvtFoK6F0saL7p9xHAqHOlCPJygA==}
     engines: {node: '>= 8'}
 
-  sourcebuster@https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/411d8dffaa37d7602d678c2ec02baacee93c12d5:
-    resolution: {tarball: https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/411d8dffaa37d7602d678c2ec02baacee93c12d5}
+  sourcebuster@https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/d7f4616d5a17e17db925ca1842457f309379d861:
+    resolution: {tarball: https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/d7f4616d5a17e17db925ca1842457f309379d861}
     version: 1.1.2
 
   space-separated-tokens@1.1.5:
@@ -58636,7 +58636,7 @@ snapshots:
 
   source-map@0.7.4: {}
 
-  sourcebuster@https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/411d8dffaa37d7602d678c2ec02baacee93c12d5: {}
+  sourcebuster@https://codeload.github.com/woocommerce/sourcebuster-js/tar.gz/d7f4616d5a17e17db925ca1842457f309379d861: {}
 
   space-separated-tokens@1.1.5: {}