CVE-2026-86204

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    CVE-2026-86204

    Published: 9 Sept 2026Last Modified: 11 Sept 2026

    Summary: PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket

    Details: PocketMine-MP versions before 5.39.2 fail to limit JSON payload size in ModalFormResponsePacket handling, allowing authenticated players to cause denial of service. Attackers can send modal form response packets with massive JSON arrays to exhaust server memory and CPU resources, rendering the server unresponsive.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86204.json, https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff, https://nvd.nist.gov/vuln/detail/CVE-2026-86204, https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-denial-of-service-via-modalformresponsepacket

    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-2026-86204 | CVE-DB