What is CVE-2022-51017?

CVE-2022-51017 is a high-severity vulnerability in Pmmp Pocketmine-Mp, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-07.

How severe is CVE-2022-51017?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Pmmp Pocketmine-Mp

CVE-2022-51017

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-09-07 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.9th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Pmmp Pocketmine-Mp

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-c6fg-99pr-25m9 (vendor-advisory)
github.com/pmmp/PocketMine-MP/commit/958a9dbf0fe3131ab60319c5a939f5dfbfe5dfbb (patch)
github.com/pmmp/PocketMine-MP/commit/6492cac5c10f9fa8443ceddd2191a7b65b73f601 (patch)
www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-and-4.0.5-denial-of-se… (third-party-advisory)

Frequently asked questions

What is CVE-2022-51017?: CVE-2022-51017 is a high-severity vulnerability in Pmmp Pocketmine-Mp, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-07.
How severe is CVE-2022-51017?: High severity. CVSS v3 base score is 7.5 out of 10.