# CVE-2026-86203

## Summary

- **CVE ID:** CVE-2026-86203
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (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)
- **CWE:** CWE-664
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 10, 2026

## 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.

## Affected Products

- pmmp — PocketMine-MP (0)
- pmmp — PocketMine-MP (5.39.2)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 19.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._