Minecraft:Java Edition 1.21.1

Template:Distinguish Template:Infobox version 1.21.1 is a minor hotfix update to Minecraft:Java Edition released on August 8, 2024,<ref name="mcnet">Template:Cite</ref> which fixes critical exploits including block entity swap, and adds two new Minecraft:languages. Servers running this version are compatible with 1.21 clients.

Additions

General

Minecraft:Languages

• Added support for Tzotzil and Belarusian (Latin) languages.

Fixes

Template:Fixes Private issues

• Fixed block entity swap based Minecraft:update suppression as shown in this video.
• Fixed an exploit which allows modified clients to crash the server by requesting command completion for a malicious target selector input, causing a crash due to stack exhaustion.