diff --git a/.changeset/lazy-owls-run.md b/.changeset/lazy-owls-run.md
new file mode 100644
index 000000000000..8dc9830c5d4e
--- /dev/null
+++ b/.changeset/lazy-owls-run.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] prevent `Content-Length` header from being incorrectly inherited by requests made from `load`'s `fetch` during SSR
diff --git a/packages/kit/src/runtime/server/page/fetch.js b/packages/kit/src/runtime/server/page/fetch.js
index 6790844b70af..5ae3b3206f62 100644
--- a/packages/kit/src/runtime/server/page/fetch.js
+++ b/packages/kit/src/runtime/server/page/fetch.js
@@ -52,6 +52,7 @@ export function create_fetch({ event, options, state, route }) {
 			if (
 				key !== 'authorization' &&
 				key !== 'connection' &&
+				key !== 'content-length' &&
 				key !== 'cookie' &&
 				key !== 'host' &&
 				key !== 'if-none-match' &&