From cb12f14955dde6e61829d70d1851bfea6a3c31ad Mon Sep 17 00:00:00 2001
From: doowb <brian.woodward@gmail.com>
Date: Mon, 24 Jun 2019 16:59:09 -0400
Subject: [PATCH] ensure only valid keys are used

---
 index.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 000a77e..0b32e8f 100644
--- a/index.js
+++ b/index.js
@@ -25,7 +25,7 @@ module.exports = function(obj, prop, val) {
     return obj;
   }
 
-  var keys = split(prop, {sep: '.', brackets: true});
+  var keys = split(prop, {sep: '.', brackets: true}).filter(isValidKey);
   var len = keys.length;
   var idx = -1;
   var current = obj;
@@ -49,3 +49,7 @@ module.exports = function(obj, prop, val) {
 
   return obj;
 };
+
+function isValidKey(key) {
+  return key !== '__proto__' && key !== 'constructor' && key !== 'prototype';
+}