pmmp PocketMine-MP up to 5.42.0 LoginPacket handler denial of service

Summaryinfo

A vulnerability classified as problematic was found in pmmp PocketMine-MP up to 5.42.0. Affected is an unknown function of the component LoginPacket handler. The manipulation results in denial of service. This vulnerability is known as CVE-2026-86200. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in pmmp PocketMine-MP up to 5.42.0. It has been classified as problematic. Affected is an unknown function of the component LoginPacket handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

PocketMine-MP versions before 5.42.1 contain a denial of service vulnerability in the LoginPacket handler that allows remote attackers to flood warning messages by injecting numerous junk properties into the clientData JWT. Attackers can craft malicious login packets with excessive unknown properties to waste server CPU time and degrade performance.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-86200 since 09/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 5.42.1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• pmmp

Name

• PocketMine-MP

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23
• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30
• 5.31
• 5.32
• 5.33
• 5.34
• 5.35
• 5.36
• 5.37
• 5.38
• 5.39
• 5.40
• 5.41
• 5.42.0

Website

• Product: https://github.com/pmmp/PocketMine-MP/

CPE 2.3info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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