CVE-2023-54394

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-09. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

PocketMine-MP before 4.18.0-ALPHA2 fails to rate-limit mismatch type InventoryTransactionPacket requests, allowing attackers to trigger excessive inventory synchronization. Attackers can send numerous mismatch transactions to force the server to transmit large amounts of serialized inventory data, consuming significant bandwidth without authentication.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

PocketMine-MP before 4.18.0-ALPHA2 Bandwidth Amplification via InventoryTransactionPacket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-4.18.0-alpha2-bandwidth-amplification-via-inventorytransactionpacket
github_commit

commit ca6d51498f12 (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit ca6d51498f12 — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/ca6d51498f12427a947467da8fcad7811418e6cc
github Patch Available🟡 PoC Available

Mismatch inventory transactions abuse to make the server spit out lots of data (bandwidth multiplier) · Advisory · pmmp/PocketMine-MP · GitHub

Affected: 4.18.0-ALPHA2 by

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-42qm-8v8m-m78c

Vendor Advisories for CVE-2023-54394(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-mp3.0.0 ... 4.9.1 (248 versions)4.18.0-ALPHA2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 33× 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 19:36 UTCEG score recompute
  2. 2026-09-18 19:36 UTCGHSA enrichment
  3. 2026-09-18 19:26 UTCEPSS rescore
  4. 2026-09-17 20:14 UTCEG score recompute
  5. 2026-09-17 20:14 UTCGHSA enrichment
  6. 2026-09-16 18:12 UTCEG score recompute
  7. 2026-09-16 18:12 UTCGHSA enrichment
  8. 2026-09-16 14:06 UTCEPSS rescore
  9. 2026-09-16 05:11 UTCEPSS rescore
  10. 2026-09-16 05:11 UTCEPSS rescore
  11. 2026-09-15 17:38 UTCEG score recompute
  12. 2026-09-15 17:38 UTCGHSA enrichment
  13. 2026-09-15 03:08 UTCEPSS rescore
  14. 2026-09-14 18:16 UTCGHSA enrichment
  15. 2026-09-13 18:12 UTCEG score recompute
  16. 2026-09-13 18:12 UTCGHSA enrichment
  17. 2026-09-13 16:45 UTCEPSS rescore
  18. 2026-09-12 18:50 UTCEG score recompute
  19. 2026-09-12 18:50 UTCGHSA enrichment
  20. 2026-09-12 14:58 UTCEPSS rescore
  21. 2026-09-11 19:28 UTCEG score recompute
  22. 2026-09-11 19:28 UTCGHSA enrichment
  23. 2026-09-11 14:51 UTCEPSS rescore
  24. 2026-09-11 09:34 UTCEPSS rescore
  25. 2026-09-10 20:07 UTCGHSA enrichment
Show 8 more
  1. 2026-09-09 20:43 UTCGHSA enrichment
  2. 2026-09-09 16:37 UTCEG score recompute
  3. 2026-09-09 16:37 UTCGHSA enrichment
  4. 2026-09-09 15:35 UTCEG score recompute
  5. 2026-09-09 15:35 UTCGHSA enrichment
  6. 2026-09-09 14:27 UTCEG score recompute
  7. 2026-09-09 13:36 UTCEG score recompute
  8. 2026-09-09 13:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2023-54394?
CVE-2023-54394 is a medium vulnerability published on September 9, 2026. PocketMine-MP before 4.18.0-ALPHA2 fails to rate-limit mismatch type InventoryTransactionPacket requests, allowing attackers to trigger excessive inventory synchronization. Attackers can send numerous mismatch transactions to force the server to transmit large amounts of serialized inventory data,…
When was CVE-2023-54394 disclosed?
CVE-2023-54394 was first published in the National Vulnerability Database on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-54394 actively exploited?
CVE-2023-54394 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 68.3% of all scored CVEs.
What is the CVSS score of CVE-2023-54394?
CVE-2023-54394 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2023-54394?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-54394, 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-2023-54394

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