Java Edition 1.18.1

Minecraft 1.18.1
Edition	Java Edition
Release date	December 10, 2021
Downloads	Client (.json) Server
Obfuscation maps	Client Server
Protocol version	757
Data version	2865
See also other instances of 1.18.1	Bedrock Edition

1.18.1 is a minor update to Java Edition, released on December 10, 2021, which makes minor changes related to fog and fixes bugs. It is compatible with 1.18 servers.

Most importantly, this version fixes a zero-day security vulnerability in the Log4j library that could be used to perform a remote code execution exploit. As a result, players were urged to secure their clients and servers.

Changes

General

Fog

• World fog now starts further away from the player, to make distant terrain more visible.
• Instead of applying fog as a spherical volume, it is now applied as a cylindrical volume.

Fixes

9 issues fixed

From released versions before 1.18

• MC-152198 – Actual render distance is 2 chunks lower than render distance setting.
• MC-219507 – Beacon's power reverts back to previous one on world reload.
• MC-229321 – Bees inside of bee hives / nests sometimes despawn when the world is reloaded.

From 1.18

• MC-242729 – Observer activating without any updates nearby, caused by /clone.
• MC-243216 – Chunk render distance on servers seems shorter than in 1.17.1.
• MC-243253 – Minecraft Realms screen is loading for long time.
• MC-243796 – Random non fatal exceptions in console: Failed to store chunk ConcurrentModificationException.

Other

• Fixed an issue that would cause players on low-bandwidth connections to get timeout errors when connecting to a server.
• Fixed a critical security issue in which attackers are able to execute code on others' devices (RCE exploit) via in-game messaging or other methods where the game logs a certain exploitable string formatted as ${jndi:ldap://<url>}, due to an upstream vulnerability in log4j2.

Trivia

• This is the first minor update to feature a third release candidate.

Videos

Videos made by slicedlime: