GHSA-xc7j-wj36-qjfr
HIGHPocketMine-MP BookEditPacket crash when inventory slot in the packet is invalid
Blast Radius
pocketmine/pocketmine-mpReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Summary
If a client sends a BookEditPacket with InventorySlot greater than 35, the server will crash due to an unhandled exception thrown by BaseInventory->getItem().
Details
PoC
Using Gophertunnel, use serverConn.WritePacket(&packet.BookEdit{InventorySlot: 36})
Impact
Server crash, all servers
Patched versions
This issue was fixed by 47f011966092f275cc1b11f8de635e89fd9651a7, and the fix was released in 5.11.2.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | pocketmine/pocketmine-mp | all versions | 5.11.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pocketmine/pocketmine-mp. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update pocketmine/pocketmine-mp to 5.11.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xc7j-wj36-qjfr is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-xc7j-wj36-qjfr is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-xc7j-wj36-qjfr. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-xc7j-wj36-qjfr in your dependencies?
O3 detects GHSA-xc7j-wj36-qjfr across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.