From f281f15fe5b1649f57f44e4ca266e4b65cda3f0b Mon Sep 17 00:00:00 2001
From: Trevor Elliott <telliott@fastly.com>
Date: Fri, 9 Feb 2024 10:06:42 -0800
Subject: [PATCH] Add the host header to the set of forbidden headers

---
 crates/wasi-http/src/types.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crates/wasi-http/src/types.rs b/crates/wasi-http/src/types.rs
index 428116dd8a11..3d8c4ef225cd 100644
--- a/crates/wasi-http/src/types.rs
+++ b/crates/wasi-http/src/types.rs
@@ -77,7 +77,7 @@ pub trait WasiHttpView: Send {
 
 /// Returns `true` when the header is forbidden according to this [`WasiHttpView`] implementation.
 pub(crate) fn is_forbidden_header(view: &mut dyn WasiHttpView, name: &HeaderName) -> bool {
-    static FORBIDDEN_HEADERS: [HeaderName; 9] = [
+    static FORBIDDEN_HEADERS: [HeaderName; 10] = [
         hyper::header::CONNECTION,
         HeaderName::from_static("keep-alive"),
         hyper::header::PROXY_AUTHENTICATE,
@@ -86,6 +86,7 @@ pub(crate) fn is_forbidden_header(view: &mut dyn WasiHttpView, name: &HeaderName
         hyper::header::TE,
         hyper::header::TRANSFER_ENCODING,
         hyper::header::UPGRADE,
+        hyper::header::HOST,
         HeaderName::from_static("http2-settings"),
     ];