Minecraft:Java Edition 25w42a

Template:Infobox version 25w42a is the second Minecraft:snapshot for Minecraft:Java Edition 1.21.11, released on October 14, 2025.<ref>Template:Snap</ref>

Additions

General

Minecraft:Environment attributes Template:Collapse

Changes

Items

Minecraft:Elytra

• Players can now Minecraft:glide with Minecraft:elytra through Minecraft:cave vines and similar blocks.<ref>Template:Bug</ref>

Minecraft:Nautilus armor

• Can now be Minecraft:smelted in a Minecraft:blast furnace or Minecraft:furnace.

Minecraft:Spawn eggs

• The zombie horse and zombie nautilus spawn eggs now work in Minecraft:Peaceful worlds.

Minecraft:Spear

• Can no longer be used to hit targets through solid blocks.
• Can no longer break item frames with the jab attack.

Mobs

Minecraft:Nautilus and Minecraft:zombie nautilus

• Can now be controlled while on land.
• Are now able to despawn when not tamed.

Minecraft:Piglin

• Piglins now consider Minecraft:golden nautilus armor as one of the items they like.

Minecraft:Skeleton horse

• No longer burns in sunlight.

Minecraft:Zombie

• Now cannot hold another item other than a spear when paired with a zombie horse.

Minecraft:Zombie horse

• Can no longer be leashed while being ridden by a jockey.

Command format

General

• Resource suggestions now show results in any namespace instead of just within minecraft.

Template:Cmd

• Switched the order of the Template:Cd argument.
  • Example: Template:Cmd is now Template:Cmd.
• Template:Cd now returns the queried value and takes in a new Template:Cd argument.
  • The returned value will be scaled by that argument and truncated.
  • The scale is optional and will default to Template:Cd if omitted.
  • Example: Template:Cmd to get the elapsed time in ticks.

Gameplay

Minecraft:Advancements

• Updated the "Minecraft:Oh Shiny" advancement to include the Minecraft:golden spear and Minecraft:golden nautilus armor.

Minecraft:Enchantments

• Minecraft:Lunge is no longer mutually exclusive with Minecraft:Mending.

General

Minecraft:Biomes

• Underwater biome fog color and fog distance is now blended based on the player's position between biomes, similarly to regular biome fog and sky colors.
• Added new attributes field for biomes to specify Environment Attributes.
  • Note: certain attributes, such as gameplay/fast_lava are not evaluated positionally and thus cannot be set on a Biome.
• Many subfields under effects have been migrated to Environment Attributes:
  • Note: the form of these attributes may not be identical to the original fields.
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd, Template:Cd, Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd

Minecraft:Data component format

• Template:Cd
  • Added new field:
    • Template:Cd: integer, the cooldown in ticks after hitting, and loosing contact with an entity before being able to hit it again.
      • Default value: Template:Cd

Minecraft:Data pack

• The Minecraft:pack format version is now Template:Cd.

Minecraft:Dimension types

• Added new attributes field for dimensions to specify Environment Attributes.
• Many fields have been migrated to Environment Attributes:
  • Note: the form of these attributes may not be identical to the original fields.
  • Template:Cd -> Template:Cd, Template:Cd, Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd -> Template:Cd
  • Template:Cd (note: not removed) -> Template:Cd

Minecraft:Minecraft Server Management Protocol

• Enable authentication from web browsers.
  • Authenticate by passing the token in Sec-WebSocket-Protocol header when opening the WebSocket connection.
    • Example: Sec-WebSocket-Protocol: minecraft-v1, <token>
  • Requests authenticating this way are subject to Origin header checks. This requires configuration of allowed origins on the server side using management-server-allowed-origins. The default value is empty, meaning Sec-Websocket-Protocol authentication is effectively disabled.

Minecraft:Resource pack

• The version is now Template:Cd.

Minecraft:Tags

• Biome Tags
  • Removed Template:Cd and Template:Cd - replaced by Template:Cd and Template:Cd Environment Attributes.
  • Removed Template:Cd - replaced by Template:Cd field in the Template:Cd Environment Attribute.
  • Removed Template:Cd - replaced by Template:Cd Environment Attribute.
• Block Tags
  • Added Template:Cd to Template:Cd tag.
• Enchantment Tags
  • Removed Template:Cd tag.
• Entity Tags
  • Added Template:Cd and removed Template:Cd from Template:Cd tag.
• Item Tags
  • Added Template:Cd to Template:Cd tag.

Trivia

• This version has the same protocol version number as Minecraft:1.21.10 Release Candidate 1. The two versions are not actually compatible; 25w42a crashes when attempting to join a 1.21.10-rc1 world, and 1.21.10-rc1 throws a "Network Protocol Error" message when attempting to join a 25w42a world.