diff --git a/.changeset/sharp-tires-work.md b/.changeset/sharp-tires-work.md
new file mode 100644
index 000000000000..4e5124f78c18
--- /dev/null
+++ b/.changeset/sharp-tires-work.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: support for `URLSearchParams.has(name, value)` overload
diff --git a/packages/kit/src/utils/url.js b/packages/kit/src/utils/url.js
index 7ea2c9d100f1..43713a4f99fa 100644
--- a/packages/kit/src/utils/url.js
+++ b/packages/kit/src/utils/url.js
@@ -98,9 +98,9 @@ export function make_trackable(url, callback, search_params_callback, allow_hash
 		value: new Proxy(tracked.searchParams, {
 			get(obj, key) {
 				if (key === 'get' || key === 'getAll' || key === 'has') {
-					return (/**@type {string}*/ param) => {
+					return (/** @type {string} */ param, /** @type {string[]} */ ...rest) => {
 						search_params_callback(param);
-						return obj[key](param);
+						return obj[key](param, ...rest);
 					};
 				}
 
diff --git a/packages/kit/src/utils/url.spec.js b/packages/kit/src/utils/url.spec.js
index 55865c413468..4ad5244833f2 100644
--- a/packages/kit/src/utils/url.spec.js
+++ b/packages/kit/src/utils/url.spec.js
@@ -172,6 +172,29 @@ describe('make_trackable', (test) => {
 		url.searchParams.entries();
 		assert.ok(tracked);
 	});
+
+	test('tracks search params when using has(name, value) overload', () => {
+		let tracked = false;
+		const tracked_search_params = new Set();
+		const url = make_trackable(
+			new URL('https://svelte.dev/docs/kit?foo=1&foo=2'),
+			() => {
+				tracked = true;
+			},
+			(search_param) => {
+				tracked_search_params.add(search_param);
+			}
+		);
+
+		// has(name, value) should track the param and return correct result
+		assert.equal(url.searchParams.has('foo', '1'), true);
+		assert.ok(!tracked);
+		assert.ok(tracked_search_params.has('foo'));
+
+		// value argument should be forwarded correctly (not just checking name existence)
+		assert.equal(url.searchParams.has('foo', '3'), false);
+		assert.ok(!tracked);
+	});
 });
 
 describe('disable_search', (test) => {