CVE-2026-86201

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pmmp/PocketMine-MP/commit/87d1c0cea09d972fd4c2fafb84dac2ecab7649f0
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h6rj-3m53-887h
https://www.vulncheck.com/advisories/pocketmine-mp-before-5.41.1-logdos-via-loginpacket-clientdata
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h6rj-3m53-887h

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-09 14:17

Updated : 2026-09-14 14:17

NVD link : CVE-2026-86201

Mitre link : CVE-2026-86201

CVE.ORG link : CVE-2026-86201

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

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