High
PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages
Type: advisorySources: OSV
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).
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-51018
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 17:50 UTC · Revision 1
Source evidence
PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages
core-osv · Original sourcePublished 7 Sept 2026, 12:55 UTC
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).
osv:CVE-2022-51018
Complete source record
{
"id": "e17029d92dcf6d7cc113d5735405299d45a263becd004dd429c32d329ea51ee0",
"url": "https://osv.dev/vulnerability/CVE-2022-51018",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages",
"summary": "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).",
"evidence": "osv:CVE-2022-51018",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2022-51018",
"aliases": [
"CVE-2022-51018",
"GHSA-p62j-hrxm-xcxf"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/pmmp/pocketmine-mp",
"type": "GIT",
"events": [
{
"introduced": "03510333dcec34fa5a59191e8e9610a9da5765ef"
},
{
"fixed": "a4af1609eaf42eff5effe04b08f2c1402d408f3d"
},
{
"introduced": "468faa464b2bc5c97f23fafbb71ea61035f6f218"
},
{
"fixed": "e7d17eb4d327f6573ae702273e3838305844d2d6"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.26.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
}
],
"versions": [
"4.0.4",
"4.0.3",
"3.26.4",
"4.0.2",
"3.26.3",
"4.0.1",
"3.26.2",
"4.0.0",
"3.26.1",
"3.26.0",
"3.25.6",
"3.25.5",
"3.25.4",
"3.25.3",
"3.25.2",
"3.25.1",
"3.25.0",
"3.24.0",
"3.23.1",
"3.23.0",
"3.22.5",
"3.22.4",
"3.22.3",
"3.22.2",
"3.22.1",
"3.22.0",
"3.21.1",
"3.21.0",
"3.20.0",
"3.19.3",
"3.19.2",
"3.19.1",
"3.18.2",
"3.19.0",
"3.18.1",
"3.17.7",
"3.18.0",
"3.17.6",
"3.17.5",
"3.17.4",
"3.17.3",
"3.17.2",
"3.17.1",
"3.17.0",
"3.16.1",
"3.16.0",
"3.15.4",
"3.15.3",
"3.15.2",
"3.15.1",
"3.15.0",
"3.14.3",
"3.14.2",
"3.14.1",
"3.14.0",
"3.13.1",
"3.13.0",
"3.12.6",
"3.12.5",
"3.12.4",
"3.12.3",
"3.12.2",
"3.12.1",
"3.11.7",
"3.12.0",
"3.11.6",
"3.11.5",
"3.11.4",
"3.11.3",
"3.11.2",
"3.11.1",
"3.10.1",
"3.11.0",
"3.9.8",
"3.10.0",
"3.9.7",
"3.9.6",
"3.9.5",
"3.9.4",
"3.9.3",
"3.9.2",
"3.9.1",
"3.9.0",
"3.8.7",
"3.8.6",
"3.8.5",
"3.8.4",
"3.8.3",
"3.8.2",
"3.8.1",
"3.8.0",
"3.7.3",
"3.7.2",
"3.7.1",
"3.7.0",
"3.6.5",
"3.6.4",
"3.6.3",
"3.6.2",
"3.6.1",
"3.6.0",
"3.5.10",
"3.5.9",
"3.5.8",
"3.5.7",
"3.5.6",
"3.5.5",
"3.5.4",
"3.5.3",
"3.5.2",
"3.5.1",
"3.5.0",
"3.4.1",
"3.4.0",
"3.2.0",
"3.0.2",
"3.0.1",
"3.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-51018.json"
}
}
],
"modified": "2026-10-28T02:30:31.011606296Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/51xxx/CVE-2022-51018.json",
"https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf",
"https://nvd.nist.gov/vuln/detail/CVE-2022-51018",
"https://www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-input-validation-via-book-pages"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/51xxx/CVE-2022-51018.json"
}
},
"related_cves": [
{
"value": "CVE-2022-51018",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 498022,
"published_at": "2026-09-07T12:55:10.538+00:00"
}