Medium 6.5Published Sep 9, 2026

CVE-2023-54392PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects pmmp PocketMine-MP. Add what you run to find out whether that includes you.

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Exploited in the last 30 days

PocketMine-MP versions >= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pmmp PocketMine-MP pmmp:pocketmine_mp (from the name)	from 4.20.0 before 4.22.3; from 5.0.0 before 5.2.1	CNA record

References

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54fvendor-advisory
https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70eapatch
https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacketthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.