What is CVE-2023-54394?

CVE-2023-54394 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-09-09.

How severe is CVE-2023-54394?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Pmmp Pocketmine-Mp

CVE-2023-54394

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.

Published 2026-09-09 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (44.6th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002

Affected products

Pmmp Pocketmine-Mp

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-42qm-8v8m-m78c (vendor-advisory)
github.com/pmmp/PocketMine-MP/commit/ca6d51498f12427a947467da8fcad7811418e6cc (patch)
www.vulncheck.com/advisories/pocketmine-mp-before-4.18.0-alpha2-bandwidth-ampli… (third-party-advisory)

Frequently asked questions

What is CVE-2023-54394?: CVE-2023-54394 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-09-09.
How severe is CVE-2023-54394?: Medium severity. CVSS v3 base score is 4.3 out of 10.