CVE-2026-86203 PUBLISHED

PocketMine-MP before 5.39.2 Item Duplication via Despawn State

Assigner: VulnCheck
Reserved: 05.09.2026 Published: 09.09.2026 Updated: 09.09.2026

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.

CVSS 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
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	High	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 3.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	pmmp
Product	PocketMine-MP
Versions	Default: unaffected affected from 0 to 5.39.2 (excl.) Version 5.39.2 is unaffected

CVE-2026-86203 PUBLISHED

PocketMine-MP before 5.39.2 Item Duplication via Despawn State

Metrics

Product Status

Credits

References

Problem Types