--- a/net/minecraft/world/level/block/CaveVines.java
+++ b/net/minecraft/world/level/block/CaveVines.java
@@ -15,17 +15,43 @@
 import net.minecraft.world.level.block.state.properties.BlockStateBoolean;
 import net.minecraft.world.phys.shapes.VoxelShape;
 
+// CraftBukkit start
+import java.util.Collections;
+import net.minecraft.world.entity.Entity;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.event.player.PlayerHarvestBlockEvent;
+// CraftBukkit end
+
 public interface CaveVines {
 
     VoxelShape SHAPE = Block.a(1.0D, 0.0D, 1.0D, 15.0D, 16.0D, 15.0D);
     BlockStateBoolean BERRIES = BlockProperties.BERRIES;
 
-    static EnumInteractionResult harvest(IBlockData iblockdata, World world, BlockPosition blockposition) {
+    static EnumInteractionResult harvest(IBlockData iblockdata, World world, BlockPosition blockposition, Entity entity) {
         if ((Boolean) iblockdata.get(CaveVines.BERRIES)) {
-            Block.a(world, blockposition, new ItemStack(Items.GLOW_BERRIES, 1));
+            // CraftBukkit start
+            if (entity instanceof EntityHuman) {
+                PlayerHarvestBlockEvent event = CraftEventFactory.callPlayerHarvestBlockEvent(world, blockposition, (EntityHuman) entity, Collections.singletonList(new ItemStack(Items.GLOW_BERRIES, 1)));
+                if (event.isCancelled()) {
+                    return EnumInteractionResult.SUCCESS; // We need to return a success either way, because making it PASS or FAIL will result in a bug where cancelling while harvesting w/ block in hand places block
+                }
+                for (org.bukkit.inventory.ItemStack itemStack : event.getItemsHarvested()) {
+                    Block.a(world, blockposition, CraftItemStack.asNMSCopy(itemStack));
+                }
+            } else {
+                Block.a(world, blockposition, new ItemStack(Items.GLOW_BERRIES, 1));
+            }
+            // CraftBukkit end
+
             float f = MathHelper.b(world.random, 0.8F, 1.2F);
 
             world.playSound((EntityHuman) null, blockposition, SoundEffects.CAVE_VINES_PICK_BERRIES, SoundCategory.BLOCKS, 1.0F, f);
+            // CraftBukkit start - call EntityChangeBlockEvent
+            if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(entity, blockposition, (IBlockData) iblockdata.set(CaveVines.BERRIES, false)).isCancelled()) {
+                return EnumInteractionResult.SUCCESS;
+            }
+            // CraftBukkit end
             world.setTypeAndData(blockposition, (IBlockData) iblockdata.set(CaveVines.BERRIES, false), 2);
             return EnumInteractionResult.a(world.isClientSide);
         } else {
