CVE-2026-86203

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    CVE-2026-86203

    Published: 9 Sept 2026Last Modified: 12 Sept 2026

    Summary: PocketMine-MP before 5.39.2 Item Duplication via Despawn State

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86203.json, https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-f9jp-856v-8642, https://nvd.nist.gov/vuln/detail/CVE-2026-86203, https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-item-duplication-via-despawn-state, https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a6ced39472135aacb64cd75b06c5adb452b9db20

    Affected versions

    5.39.1
    5.39.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-86203 | CVE-DB