Vulnerability · Published Sep 7, 2026 · Assigned by VulnCheck

CVE-2022-51017PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data

High 7.5

In plain English

A high-severity improper input validation in PocketMine-MP from pmmp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% 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 49.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	pocketmine/pocketmine-mp	3.26.5	GHSA-c6fg-99pr-25m9
Packagist	pocketmine/pocketmine-mp	4.0.5	GHSA-c6fg-99pr-25m9

Affected products (as reported)

Vendor	Product	Versions
pmmp	PocketMine-MP	3.0.0 – before 3.26.54.0.0 – before 4.0.5

Weakness: CWE-20 · 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-c6fg-99pr-25m9) vendor-advisory
Patch Commit patch
Patch Commit patch
VulnCheck Advisory: PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data third-party-advisory