Pre-release 7 for Minecraft 1.20 is now available in the Minecraft Launcher. This pre-release adds validation of symbolic links and fixes a bug.

CHANGES

To improve safety, the game will now detect symbolic links used inside world directory.For a detailed explanation, check our help article.

• If the target of a symbolic link is not on the user-configured allow-list, the game will not proceed with loading the world
  • Note: world directory itself can still be linked
• The list of allowed symbolic link targets is stored in file allowed_symlinks.txt in client or server top directory
• The file consists of entries (one per line) with following formats allowed:
  • Lines starting with # are comments and are ignored
  • [type]pattern, where type can be glob, regex or prefix
    • prefix matches start of path with given pattern (so for /test paths /test, /test/ and /test/foo.txt would match)
    • regex matches regular expression against whole path
    • glob uses OS-specific path matching mechanism (for example *.txt would usually match files with txt extension)
    • Note: paths will use OS-specific separators
  • pattern, which uses default prefix type

FIXED BUG IN 1.20 PRE-RELEASE 7

• MC-257778 - Bamboo Mosaic Slabs and Stairs are not in the #slabs and #stairs block and item tags

GET THE PRE-RELEASE

Pre-release are available for Minecraft: Java Edition. To install the Pre-release, open up the Minecraft Launcher and enable snapshots in the "Installations" tab.

Testing versions can corrupt your world, so please backup and/or run them in a different folder from your main worlds.

Cross-platform server jar:

• Minecraft server jar

Report bugs here:

• Minecraft issue tracker!

Want to give feedback?

• For any feedback and suggestions on our upcoming 1.20 features, head over to the dedicated Feedback site category. If you're feeling chatty, join us over at the official Minecraft Discord.