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Vulnerability record · CVE-2022-51018 · published 7 September 2026

CVE-2022-51018: Uncontrolled resource consumption vulnerability

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).

7.1 CVSS 4.0 High EPSS 0.42% · top 66.5% CWE-400 · Uncontrolled resource consumption Deferred
7.1CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
14 Sep 2026Last modified by NVD

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).

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf
https://www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-input-validation-via-book-pages

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Source: NIST National Vulnerability Database (record CVE-2022-51018), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.