CVE-2022-51018
Received Received - Intake

Book Bomb Vulnerability in PocketMine-MP

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: VulnCheck

Description
PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT ('book bombs'), causing excess bandwidth consumption and server crashes (exceeding the 1 MB chunk size limit when saving region-based worlds in PM3, or exceeding the 32 KiB TAG_String limit in PM4).

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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-2022-51018
EUVD
EUVD-2022-56047

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
pocketmine mp to 3.26.5 (exc)
pocketmine mp to 4.0.5 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

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Executive Summary

CVE-2022-51018 is a vulnerability in PocketMine-MP where book page text, page count, and author/title length are not properly limited. This allows players to create oversized books with excessive characters, leading to bandwidth consumption and server crashes. The issue was fixed in versions 3.26.5 and 4.0.5.

Detection Guidance

Monitor server logs for crashes or bandwidth spikes during book interactions. Check for unusually large NBT data in saved world files or excessive memory usage. Use plugins like 'BookEditRestrict' to log attempts to create oversized books.

Impact Analysis

This vulnerability can cause server crashes due to excessive bandwidth usage or exceeding chunk size limits. It may also disrupt gameplay by making servers unresponsive. Players with writable books can exploit this to create 'book bombs' that overload the server.

Compliance Impact

This vulnerability primarily impacts server availability by causing crashes due to excessive resource consumption, which could indirectly affect compliance with standards like GDPR or HIPAA that require data availability and system reliability. However, the vulnerability itself does not directly violate these regulations but may contribute to operational failures that could lead to non-compliance if critical services are disrupted.

Mitigation Strategies

Upgrade PocketMine-MP to version 3.26.5 or 4.0.5 or later. Alternatively, ban writable books or use a plugin to restrict book edits based on text length and page count.

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