From a4b8c1379806ccc9de694eca210f9470e079bab6 Mon Sep 17 00:00:00 2001
From: James M Snell <jasnell@gmail.com>
Date: Mon, 16 Aug 2021 07:12:22 -0700
Subject: [PATCH] events: protect property defs against prototype polution

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/39773
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
---
 lib/internal/worker/io.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/internal/worker/io.js b/lib/internal/worker/io.js
index 9ec95509b56778..5d03f43ef6df62 100644
--- a/lib/internal/worker/io.js
+++ b/lib/internal/worker/io.js
@@ -142,6 +142,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   origin: {
     get() {
@@ -151,6 +152,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   lastEventId: {
     get() {
@@ -160,6 +162,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   source: {
     get() {
@@ -169,6 +172,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   ports: {
     get() {
@@ -178,6 +182,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
 });