CVE-2026-86203
PocketMine-MP before 5.39.2 Item Duplication via Despawn State
- State
- Published
- Severity
- 6.3 Medium
- Published
- Sep 9, 2026
- Updated
- Oct 8, 2026
- Reserved
- Sep 5, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | 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 | VulnCheck |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-664 Improper Control of a Resource Through its Lifetime
Affected Products
| Product | Versions |
|---|---|
PocketMine-MPpmmp |
|
References
- GitHub Security Advisory (GHSA-f9jp-856v-8642)vendor-advisory
- Patch Commitpatch
- VulnCheck Advisory: PocketMine-MP before 5.39.2 Item Duplication via Despawn Statethird-party-advisory
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