NoFingerprint is a fabric client-side mod that fixes an exploit in Minecraft’s resource pack downloader. This vulnerability allows malicious servers to fingerprint your Minecraft account by forcing all resource pack downloads to occur in a server-controlled folder path.
In vanilla Minecraft, when a server sends a resource pack, the game generates a download folder based on a server-provided UUID. Some servers discovered they can:
Track players across sessions
Correlate accounts
Build unique device “fingerprints”
Log download identifiers tied to your account
All without your permission.
This creates a silent privacy leak and has already been weaponized on PvP and cracked servers.