diff --git a/.changeset/funny-pets-walk.md b/.changeset/funny-pets-walk.md
new file mode 100644
index 000000000000..0327d43d2c3e
--- /dev/null
+++ b/.changeset/funny-pets-walk.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Add a additional check for `null` on the `req.body` check in `NodeApp.render`.
diff --git a/packages/astro/src/core/app/node.ts b/packages/astro/src/core/app/node.ts
index e7a3efca81ce..97d7b71d18dd 100644
--- a/packages/astro/src/core/app/node.ts
+++ b/packages/astro/src/core/app/node.ts
@@ -48,7 +48,7 @@ export class NodeApp extends App {
 			);
 		}
 
-		if (typeof req.body === 'object' && Object.keys(req.body).length > 0) {
+		if (typeof req.body === 'object' && req.body !== null && Object.keys(req.body).length > 0) {
 			return super.render(
 				req instanceof Request
 					? req