CVE-2023-54394Network attack vector

Bandwidth exhaustion via uncoalesced inventory resynchronization

Published Sep 9, 2026 · Updated Sep 9, 2026

Uncontrolled resource consumption in PMMP PocketMine-MP before 4.18.0-ALPHA2 allows remote attackers to exhaust server bandwidth. The inventory handler immediately resynchronizes every open inventory for each mismatch-type InventoryTransactionPacket instead of coalescing requests until the tick ends. A connected Bedrock client can repeat small requests to induce megabytes of serialized inventory traffic and degrade service availability.

CVSS severity4.3
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in PMMP PocketMine-MP before 4.18.0-ALPHA2 allows remote attackers to exhaust server bandwidth. The inventory handler immediately resynchronizes every open inventory for each mismatch-type InventoryTransactionPacket instead of coalescing requests until the tick ends. A connected Bedrock client can repeat small requests to induce megabytes of serialized inventory traffic and degrade service availability.

The record

CVE
CVE-2023-54394
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
PMMP
Product
PocketMine-MP
Classifications
CWE-400, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.18.0-ALPHA2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PMMP · PocketMine-MPversion=0 <4.18.0-ALPHA2

Published CVSS scores

4.3PMMPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1498Network Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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