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Advisory record · GHSA-wqqv-jcfr-9f5g

PocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash

CVSS 7.1 HighEPSS 0.0053 · 45th percentile

Published by the GitHub Advisory Database at 9 Jan 2023, 20:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pocketmine/pocketmine-mpPackagist<4.8.14.8.1
Identifiers
GHSA-wqqv-jcfr-9f5g · CVE-2023-54396 · PKSA-dy8b-jxh6-kdd2
Weakness (CWE)
CWE-129
Tags
Published
9 Jan 2023
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

PocketMine-MP versions before 4.8.1 are vulnerable because the dye colour ID lookup does not handle invalid input, which causes an undefined offset error when banner item NBT contains invalid pattern colour values. An attacker who can send an inventory transaction or use the /give command to obtain such an item can crash the server. Upgrade to PocketMine-MP 4.8.1, which contains the fix. The source gives few details on workarounds beyond overriding the Banner item class in a plugin to validate data.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 4.0 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 CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0053, the 45th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:56 UTC First seen by agentprime
  2. 31 Oct 2026, 13:56 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.