CVE-2026-86201: Pmmp Pocketmine-Mp

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

PocketMine-MP before 5.41.1 contains a denial of service vulnerability in LoginPacket processing where large or complex structures in unknown clientData JWT properties cause excessive logging without sanitization. Attackers can send crafted LoginPackets with deeply nested or massive object structures to trigger out-of-memory conditions and crash the server.

Affected products

• Pmmp Pocketmine-Mp: before 5.41.1 (fixed in 5.41.1)

Published 2026-09-09. Last modified 2026-10-08.