diff --git a/.changeset/curvy-trains-dress.md b/.changeset/curvy-trains-dress.md
new file mode 100644
index 000000000000..2d29ff1b47b2
--- /dev/null
+++ b/.changeset/curvy-trains-dress.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: strip internal data before passing URL to `reroute`
diff --git a/packages/kit/src/runtime/server/respond.js b/packages/kit/src/runtime/server/respond.js
index e260a08b00f1..ab51505a897c 100644
--- a/packages/kit/src/runtime/server/respond.js
+++ b/packages/kit/src/runtime/server/respond.js
@@ -85,6 +85,21 @@ export async function respond(request, options, manifest, state) {
 		return text('Not found', { status: 404 });
 	}
 
+	const is_data_request = has_data_suffix(url.pathname);
+	/** @type {boolean[] | undefined} */
+	let invalidated_data_nodes;
+	if (is_data_request) {
+		url.pathname =
+			strip_data_suffix(url.pathname) +
+				(url.searchParams.get(TRAILING_SLASH_PARAM) === '1' ? '/' : '') || '/';
+		url.searchParams.delete(TRAILING_SLASH_PARAM);
+		invalidated_data_nodes = url.searchParams
+			.get(INVALIDATED_PARAM)
+			?.split('')
+			.map((node) => node === '1');
+		url.searchParams.delete(INVALIDATED_PARAM);
+	}
+
 	// reroute could alter the given URL, so we pass a copy
 	let rerouted_path;
 	try {
@@ -126,22 +141,6 @@ export async function respond(request, options, manifest, state) {
 		return text('Not found', { status: 404, headers });
 	}
 
-	const is_data_request = has_data_suffix(decoded);
-	/** @type {boolean[] | undefined} */
-	let invalidated_data_nodes;
-	if (is_data_request) {
-		decoded = strip_data_suffix(decoded) || '/';
-		url.pathname =
-			strip_data_suffix(url.pathname) +
-				(url.searchParams.get(TRAILING_SLASH_PARAM) === '1' ? '/' : '') || '/';
-		url.searchParams.delete(TRAILING_SLASH_PARAM);
-		invalidated_data_nodes = url.searchParams
-			.get(INVALIDATED_PARAM)
-			?.split('')
-			.map((node) => node === '1');
-		url.searchParams.delete(INVALIDATED_PARAM);
-	}
-
 	if (!state.prerendering?.fallback) {
 		// TODO this could theoretically break — should probably be inside a try-catch
 		const matchers = await manifest._.matchers();
diff --git a/packages/kit/test/apps/basics/src/hooks.js b/packages/kit/test/apps/basics/src/hooks.js
index deb1576401b0..3897bb949252 100644
--- a/packages/kit/test/apps/basics/src/hooks.js
+++ b/packages/kit/test/apps/basics/src/hooks.js
@@ -4,7 +4,8 @@ import { Foo } from './lib';
 const mapping = {
 	'/reroute/basic/a': '/reroute/basic/b',
 	'/reroute/client-only-redirect/a': '/reroute/client-only-redirect/b',
-	'/reroute/preload-data/a': '/reroute/preload-data/b'
+	'/reroute/preload-data/a': '/reroute/preload-data/b',
+	'/reroute/invalidate/a': '/reroute/invalidate'
 };
 
 /** @type {import("@sveltejs/kit").Reroute} */
diff --git a/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.server.js b/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.server.js
new file mode 100644
index 000000000000..e410319baae7
--- /dev/null
+++ b/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.server.js
@@ -0,0 +1,5 @@
+export function load({ isDataRequest }) {
+	return {
+		request: isDataRequest
+	};
+}
diff --git a/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.svelte b/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.svelte
new file mode 100644
index 000000000000..4f4589198f8d
--- /dev/null
+++ b/packages/kit/test/apps/basics/src/routes/reroute/invalidate/+page.svelte
@@ -0,0 +1,11 @@
+<script>
+	import { invalidateAll } from '$app/navigation';
+
+	export let data;
+</script>
+
+<button on:click={async () => await invalidateAll()}>Invalidate</button>
+
+{#if data.request}
+	<p>data request: {data.request}</p>
+{/if}
diff --git a/packages/kit/test/apps/basics/test/client.test.js b/packages/kit/test/apps/basics/test/client.test.js
index c8f15f518348..65ead7cb3e1e 100644
--- a/packages/kit/test/apps/basics/test/client.test.js
+++ b/packages/kit/test/apps/basics/test/client.test.js
@@ -1399,6 +1399,12 @@ test.describe('reroute', () => {
 
 		expect(await page.textContent('h1')).toContain('Full Navigation');
 	});
+
+	test('reroute works with invalidate', async ({ page }) => {
+		await page.goto('/reroute/invalidate/a');
+		await page.click('button');
+		await expect(page.locator('p')).toHaveText('data request: true');
+	});
 });
 
 test.describe('init', () => {