---
id: CVE-2023-54394
title: >-
  PocketMine-MP before 4.18.0-ALPHA2 fails to rate-limit mismatch type
  InventoryTransactionPacket requests, allowing attackers to trigger excessive
  inventory synchronization
summary: >-
  PocketMine-MP before 4.18.0-ALPHA2 fails to rate-limit mismatch type
  InventoryTransactionPacket requests, allowing attackers to trigger excessive
  inventory synchronization. Attackers can send numerous mismatch transactions
  to force the s…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-770
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP < 4.18.0-ALPHA2
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:20:21.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-54394'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/ca6d51498f12427a947467da8fcad7811418e6cc
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-42qm-8v8m-m78c
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-before-4.18.0-alpha2-bandwidth-amplification-via-inventorytransactionpacket
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T15:19:38.383031Z'
ingestedAt: '2026-09-13T12:14:54.813Z'
epss: 0.00379
epssPercentile: 0.29017
---

## Overview

PocketMine-MP before 4.18.0-ALPHA2 fails to rate-limit mismatch type InventoryTransactionPacket requests, allowing attackers to trigger excessive inventory synchronization. Attackers can send numerous mismatch transactions to force the server to transmit large amounts of serialized inventory data, consuming significant bandwidth without authentication.

## Remediation

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