Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck

CVE-2026-86201PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData

High 7.5

In plain English

A high-severity uncontrolled resource consumption in PocketMine-MP from pmmp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 50.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	pocketmine/pocketmine-mp	5.41.1	GHSA-h6rj-3m53-887h

Affected products (as reported)

Vendor	Product	Versions
pmmp	PocketMine-MP	0 – before 5.41.1

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-h6rj-3m53-887h) vendor-advisory
Patch Commit patch
VulnCheck Advisory: PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData third-party-advisory