CVE-2022-51017

High

Description

PocketMine-MP versions before 3.26.5 and 4.0.5 fail to validate the length of skin data fields submitted by players, allowing uncapped values to exceed the 32767 byte TAG_String limit. Attackers can submit oversized skin data fields like skinID or geometryName to trigger exceptions during NBT data serialization, causing server crashes.

SeverityHigh

CVSS7.5

Exploit probability—

ProductPocketmine/pocketmine-mp

PublishedSep 7, 2026

First seenSep 7, 2026

Weakness typeCWE-20Improper input validation

How to fix

Update

pocketmine/pocketmine-mp3.26.5, 4.0.5 or later

Patches

Vendor advisories

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-c6fg-99pr-25m9

Affected products

Product	Affected versions	Fixed in
pocketmine/pocketmine-mpPackagist	v < 3.26.5, 4.0.0 ≤ v < 4.0.5	3.26.5, 4.0.5

Check your version

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