Compatibility
Minecraft: Java Edition
1.21.x
1.20.x
Platforms
Creators
Details
Licensed CC-BY-NC-SA-4.0
Published last year
Updated last week
Changelog
SmartSpawner - Version 1.5.6.2
Critical Dupe Patched
- Fixed item duplication exploit caused by race condition in VirtualInventory synchronization with storage GUI
Technical Details
The exploit involved using two game instances with swarm mode (custom mod) to create a race condition between spawner inventories. This has been completely patched by:
- Synchronizing inventory operations across all connected clients
- Adding transaction verification before committing item changes
- Implementing proper locking mechanisms for concurrent access
All users running v1.5.4.3 or lower should update immediately.
Files
Metadata
Release channel
ReleaseVersion number
1.5.6.2Loaders
Game versions
1.21–1.21.10Downloads
723Publication date
November 9, 2025 at 9:52 PMPublisher

Nighterr
Owner


