What is CVE-2023-54396?

CVE-2023-54396 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-09-09.

How severe is CVE-2023-54396?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Pmmp Pocketmine-Mp

CVE-2023-54396

PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (30.4th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.4% 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: 0.004 · change: 0.000

Affected products

Pmmp Pocketmine-Mp

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-wqqv-jcfr-9f5g (vendor-advisory)
github.com/pmmp/PocketMine-MP/commit/08b9495bce2d65a6d1d3eeb76e484499a00765eb (patch)
www.vulncheck.com/advisories/pocketmine-mp-before-4.8.1-server-crash-via-banner… (third-party-advisory)

Frequently asked questions

What is CVE-2023-54396?: CVE-2023-54396 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-09-09.
How severe is CVE-2023-54396?: Medium severity. CVSS v3 base score is 6.5 out of 10.