CVE-2022-51018

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-07. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

PocketMine-MP before 3.26.5 Input Validation via Book Pages | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-input-validation-via-book-pages
github Patch Available🟡 PoC Available

Book page text, count, and author/title length is not limited · Advisory · pmmp/PocketMine-MP · GitHub

Affected: 3.26.5 and 4.0.5.

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf

Vendor Advisories for CVE-2022-51018(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pocketmine/pocketmine-mp4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.44.0.5—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:35 UTCEG score recompute
  2. 2026-09-18 19:35 UTCGHSA enrichment
  3. 2026-09-17 20:21 UTCEG score recompute
  4. 2026-09-17 20:21 UTCGHSA enrichment
  5. 2026-09-16 18:57 UTCEG score recompute
  6. 2026-09-16 18:57 UTCGHSA enrichment
  7. 2026-09-16 14:05 UTCEPSS rescore
  8. 2026-09-16 05:11 UTCEPSS rescore
  9. 2026-09-15 19:42 UTCEG score recompute
  10. 2026-09-15 19:42 UTCGHSA enrichment
  11. 2026-09-15 03:07 UTCEPSS rescore
  12. 2026-09-14 20:27 UTCEG score recompute
  13. 2026-09-14 20:27 UTCGHSA enrichment
  14. 2026-09-14 19:40 UTCEG score recompute
  15. 2026-09-14 19:40 UTCGHSA enrichment
  16. 2026-09-14 15:37 UTCEG score recompute
  17. 2026-09-14 15:37 UTCGHSA enrichment
  18. 2026-09-13 16:44 UTCEPSS rescore
  19. 2026-09-13 16:23 UTCGHSA enrichment
  20. 2026-09-12 17:09 UTCEG score recompute
  21. 2026-09-12 17:09 UTCGHSA enrichment
  22. 2026-09-11 17:55 UTCEG score recompute
  23. 2026-09-11 17:55 UTCGHSA enrichment
  24. 2026-09-11 14:50 UTCEPSS rescore
  25. 2026-09-11 09:34 UTCEPSS rescore
Show 13 more
  1. 2026-09-10 18:41 UTCEG score recompute
  2. 2026-09-10 18:41 UTCGHSA enrichment
  3. 2026-09-09 19:27 UTCEG score recompute
  4. 2026-09-09 19:27 UTCGHSA enrichment
  5. 2026-09-08 21:57 UTCEPSS rescore
  6. 2026-09-08 20:12 UTCGHSA enrichment
  7. 2026-09-08 11:41 UTCEG score recompute
  8. 2026-09-08 11:41 UTCGHSA enrichment
  9. 2026-09-08 11:03 UTCEG score recompute
  10. 2026-09-08 11:03 UTCGHSA enrichment
  11. 2026-09-07 13:21 UTCEG score recompute
  12. 2026-09-07 13:04 UTCEG score recompute
  13. 2026-09-07 13:01 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2022-51018?
CVE-2022-51018 is a medium vulnerability published on September 7, 2026. 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 was CVE-2022-51018 disclosed?
CVE-2022-51018 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-51018 actively exploited?
CVE-2022-51018 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.3% of all scored CVEs.
What is the CVSS score of CVE-2022-51018?
CVE-2022-51018 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2022-51018?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-51018, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-51018

Explore →

Is Your Infrastructure Affected by CVE-2022-51018?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs