CVE-2022-51017
Received Received - Intake

PocketMine-MP Skin Data Length Validation Flaw

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: VulnCheck

Description
PocketMine-MP versions before 3.26.5 and 4.0.5 fail to validate the length of skin data fields submitted by players, allowing uncapped values to exceed the 32767 byte TAG_String limit. Attackers can submit oversized skin data fields like skinID or geometryName to trigger exceptions during NBT data serialization, causing server crashes.

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2022-51017
EUVD
EUVD-2022-56046

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
pocketmine mp to 3.26.5|end_excluding=4.0.5 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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Executive Summary

CVE-2022-51017 is a vulnerability in PocketMine-MP server software where skin data fields like skinID or geometryName are not validated for length. Attackers can submit oversized values exceeding 32767 bytes, causing server crashes during NBT data serialization.

Detection Guidance

Check PocketMine-MP server version. If running versions before 3.26.5 or 4.0.5, the system is vulnerable. Monitor server logs for crashes during skin data processing or NBT serialization errors.

Impact Analysis

This vulnerability allows attackers to crash PocketMine-MP servers by sending maliciously large skin data, leading to denial-of-service conditions. Servers running unpatched versions before 3.26.5 or 4.0.5 are affected.

Compliance Impact

This vulnerability primarily impacts server availability by causing crashes through oversized skin data submissions. It does not directly relate to data privacy or protection requirements under standards like GDPR or HIPAA, which focus on unauthorized access, data breaches, or improper handling of personal information.

Mitigation Strategies

Update PocketMine-MP to version 3.26.5 or 4.0.5 or later. Ensure input validation for skin data fields is enforced to prevent oversized submissions.

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