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5.3

PocketMine-MP servers can be flooded with inventory data

CVE-2023-54394 · published 1 month ago
Summary

PocketMine-MP versions older than 4.18.0-ALPHA2 can be tricked into sending huge amounts of inventory information when it receives specially crafted requests. This can waste bandwidth and slow down the server, even though the attacker does not need to log in. Update PocketMine-MP to 4.18.0-ALPHA2 or later, or apply a patch that limits how often these inventory packets are processed.

What to do
  • Update pmmp pocketmine-mp to version 4.18.0-ALPHA2 or later.
Affected software
VendorProductAffected versions
pmmp pocketmine-mp < 4.18.0-ALPHA2
Original advisory text
PocketMine-MP before 4.18.0-ALPHA2 Bandwidth Amplification via InventoryTransactionPacket
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-770Allocation of Resources Without Limits
Timeline
Published9 Sep 2026
Updated4 Nov 2026
First seen9 Sep 2026
Sources
CVE-2023-54394 · NVD
CVE-2023-54394 · MITRE
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