GHSA-8cwq-4cmf-px73
HIGHPocketMine-MP invalid skin geometry JSON data leading to server crash
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
Impact
pocketmine\entity\Skin doesn't correctly handle errors produced by adhocore/json-comment, which throws RuntimeException rather than returning false as PocketMine-MP expects.
This leads to a server crash if the skin geometry data is invalid for some reason (e.g. a syntax error).
Patches
c9626c610b8f6810c8c987559c9197b2a291f0bb
Workarounds
A plugin could handle LoginPacket and PlayerSkinPacket to verify the skin geometry data can be parsed correctly, so that the error condition in the core code is never reached.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | pocketmine/pocketmine-mp | all versions | 4.7.2 |
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 4.7.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8cwq-4cmf-px73 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-8cwq-4cmf-px73 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-8cwq-4cmf-px73. 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-8cwq-4cmf-px73 in your dependencies?
O3 detects GHSA-8cwq-4cmf-px73 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.