CVE-2026-86202 PocketMine-MP before 5.39.2 Network Amplification via ActorEventPacket
Attackers can cause server resource exhaustion and denial of service by sending crafted packets that trigger excessive animations for all players.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86202?
CVE-2026-86202 is a medium-severity denial of service vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
PocketMine-MP versions before 5.39.2 contain a network amplification vulnerability in ActorEventPacket handling that allows clients to trigger consuming animations for all visible players. Attackers can send crafted ActorEventPacket messages to spam animation events to other clients and waste server CPU and memory resources.
Weakness: CWE-406
Which versions are affected by CVE-2026-86202?
2 open source packages ship an affected version, including pocketmine/pocketmine-mp.
| Package | Affected | Fixed in |
|---|---|---|
pocketmine/pocketmine-mp Packagist | All versions | 5.39.2 |
pocketmine/pocketmine-mp Packagist | All versions | 5.39.2 |
How do I fix CVE-2026-86202?
Upgrade pocketmine/pocketmine-mp to 5.39.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86202 being exploited?
There is no known exploitation of CVE-2026-86202 in the wild and no public exploit code.
Sources
Also known as GHSA-5g4f-vg94-wpxh, GHSA-7hmv-4j2j-pp6f.