CVE-2026-86203

LOW 3.7

PocketMine-MP before 5.39.2 Item Duplication via Despawn State

CVSS Score

3.7

EPSS Score

0.0%

EPSS Percentile

0th

PocketMine-MP versions before 5.39.2 fail to validate entity despawn state when processing attack packets from clients. Attackers can exploit a race condition by attacking a disconnecting player to trigger multiple death handlers, causing inventory items and experience to drop multiple times for duplication.

CWE	CWE-664
Vendor	pmmp
Product	pocketmine-mp
Published	Sep 9, 2026
Last Updated	Sep 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

pmmp / PocketMine-MP

0 < 5.39.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-f9jp-856v-8642 github.com: https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683 vulncheck.com: https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-item-duplication-via-despawn-state

Credits

🔍 kostamax27 dktapps