---
cve: "CVE-2026-86204"
severity: "HIGH"
cvss: 7.1
epss: "0.4%"
vendor: "pmmp"
kev: false
exploited: false
published: "2026-09-09 14:17:21"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T13:46:50+02:00"
---

# CVE-2026-86204

> 7.1 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a6ced39472135aacb64cd75b06c5adb452b9db20 (Commit)

## Referenzen

- <https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff>
- <https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-denial-of-service-via-modalformresponsepacket>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-86204) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_