---
title: "CVE-2026-86199: PocketMine-MP - Denial of Service"
description: "PocketMine-MP < 5.43.1 contains a denial of service caused by improper validation of the Certificate field during offline login authentication, letting unauthenticated players crash the server by triggering an uninitialized property access error."
url: https://panop.io/threat-heartbeat/CVE-2026-86199/
---

# CVE-2026-86199 PocketMine-MP - Denial of Service

PocketMine-MP < 5.43.1 contains a denial of service caused by improper validation of the Certificate field during offline login authentication, letting unauthenticated players crash the server by triggering an uninitialized property access error.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.47% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86199)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

9 September 2026

Updated

15 October 2026

Weakness

[CWE-184](https://cwe.mitre.org/data/definitions/184.html)

## Vendor fix

Upgrade to version 5.43.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-86199](https://nvd.nist.gov/vuln/detail/CVE-2026-86199)
- [https://github.com/pmmp/PocketMine-MP/commit/8c75a1d739e8e190d3cc2338b25cebcc9c052b1b](https://github.com/pmmp/PocketMine-MP/commit/8c75a1d739e8e190d3cc2338b25cebcc9c052b1b)
- [https://github.com/pmmp/PocketMine-MP/commit/e4aaef4ee0f769b52dc0347a1d6da403b9691115](https://github.com/pmmp/PocketMine-MP/commit/e4aaef4ee0f769b52dc0347a1d6da403b9691115)
- [https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g2fj-p69p-9chp](https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g2fj-p69p-9chp)
- [https://www.vulncheck.com/advisories/pocketmine-mp-before-5.43.1-denial-of-service-via-unauthenticated-login](https://www.vulncheck.com/advisories/pocketmine-mp-before-5.43.1-denial-of-service-via-unauthenticated-login)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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