From 9b803920852c25be72ce383dcd99a3d7eaed5607 Mon Sep 17 00:00:00 2001
From: Bukkit/Spigot <noreply+git-bukkit@papermc.io>
Date: Sun, 19 Aug 2012 05:53:30 -0500
Subject: [PATCH] Fully restrict the org.bukkit and net.minecraft namespace

By: Wesley Wolfe <weswolf@aol.com>
---
 .../main/java/org/bukkit/plugin/java/PluginClassLoader.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/paper-api/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/paper-api/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
index dd7bffc5b..3e26e7559 100644
--- a/paper-api/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+++ b/paper-api/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -30,6 +30,9 @@ public class PluginClassLoader extends URLClassLoader {
     }
 
     protected Class<?> findClass(String name, boolean checkGlobal) throws ClassNotFoundException {
+        if (name.startsWith("org.bukkit.") || name.startsWith("net.minecraft.")) {
+            throw new ClassNotFoundException(name);
+        }
         Class<?> result = classes.get(name);
 
         if (result == null) {