GHSA-7hmv-4j2j-pp6f
MEDIUMPocketMine-MP: Network amplification vulnerability with `ActorEventPacket`
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
The server handles ActorEventPacket to trigger consuming animations from vanilla clients when they eat food or drink potions.
This can be abused to make the server spam other clients, and to waste server CPU and memory. For every ActorEventPacket sent by the client, an animation event will be sent to every other player the attacker is visible to.
This is similar to various other vulnerabilities which were fixed in the network overhaul of PM4 (e.g. AnimatePacket and LevelSoundEventPacket), but somehow this one slipped through the net.
Patches
The problem was addressed in aeea1150a772a005b92bd418366f1b7cf1a91ab5 by changing the mechanism for consuming animations to be fully controlled by the server. ActorEventPacket from the client is now discarded.
Workarounds
A plugin could use DataPacketDecodeEvent to rate-limit ActorEventPacket to prevent the attack.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | pocketmine/pocketmine-mp | all versions | 5.39.2 |
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 5.39.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7hmv-4j2j-pp6f 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-7hmv-4j2j-pp6f 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-7hmv-4j2j-pp6f. 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-7hmv-4j2j-pp6f in your dependencies?
O3 detects GHSA-7hmv-4j2j-pp6f across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.