---
id: CVE-2026-86203
title: >-
  PocketMine-MP versions before 5.39.2 fail to validate entity despawn state
  when processing attack packets from clients
summary: >-
  PocketMine-MP versions before 5.39.2 fail to validate entity despawn state
  when processing attack packets from clients. Attackers can exploit a race
  condition by attacking a disconnecting player to trigger multiple death
  handlers, causin…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-664
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP < 5.39.2
published: '2026-09-09'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T15:17:50.307'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86203'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-f9jp-856v-8642
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-item-duplication-via-despawn-state
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T14:18:46.770958Z'
ingestedAt: '2026-09-10T20:38:11.038Z'
epss: 0.00348
epssPercentile: 0.25648
---

## Overview

PocketMine-MP versions before 5.39.2 fail to validate entity despawn state when processing attack packets from clients. Attackers can exploit a race condition by attacking a disconnecting player to trigger multiple death handlers, causing inventory items and experience to drop multiple times for duplication.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.