Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck
CVE-2026-86203PocketMine-MP before 5.39.2 Item Duplication via Despawn State
Low 3.7
In plain English
A low-severity security flaw in PocketMine-MP from pmmp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.3%top 71.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | pocketmine/pocketmine-mp | 5.39.2 | GHSA-f9jp-856v-8642 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pmmp | PocketMine-MP | 0 – before 5.39.2 |
Weakness: CWE-664 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- GitHub Security Advisory (GHSA-f9jp-856v-8642) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: PocketMine-MP before 5.39.2 Item Duplication via Despawn State third-party-advisory