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Vulnerability record · CVE-2022-51012 · published 7 September 2026

CVE-2022-51012: Improper input validation vulnerability

PocketMine-MP versions before 4.2.9 fail to properly validate NBT data types during deserialization of inventory transaction packets from clients. Attackers can send crafted inventory transactions with malformed NBT tags to trigger server crashes and cause denial of service.

7.1 CVSS 4.0 High EPSS 0.51% · top 59.0% CWE-20 · Improper input validation Deferred
7.1CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

Description

PocketMine-MP versions before 4.2.9 fail to properly validate NBT data types during deserialization of inventory transaction packets from clients. Attackers can send crafted inventory transactions with malformed NBT tags to trigger server crashes and cause denial of service.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/pmmp/PocketMine-MP/commit/5a98b08ee8dc8ff14862cd83d2e4af9d212fefc2
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g5rr-p69h-7v3g
https://www.vulncheck.com/advisories/pocketmine-mp-before-4.2.9-denial-of-service-via-nbt-deserialization

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Source: NIST National Vulnerability Database (record CVE-2022-51012), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.