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.
History

Thu, 10 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 10 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Pmmp
Pmmp pocketmine-mp
Vendors & Products Pmmp
Pmmp pocketmine-mp

Wed, 09 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title PocketMine-MP before 5.39.2 Item Duplication via Despawn State
Weaknesses CWE-664
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-09T13:32:04.400Z

Updated: 2026-09-10T14:57:58.125Z

Reserved: 2026-09-05T11:52:36.822Z

Link: CVE-2026-86203

cve-icon Vulnrichment

Updated: 2026-09-10T14:18:47.443Z

cve-icon NVD

Status : Deferred

Published: 2026-09-09T14:17:21.550

Modified: 2026-09-10T15:17:50.307

Link: CVE-2026-86203

cve-icon Redhat

No data.