# CVE-2026-86204

## Summary

- **CVE ID:** CVE-2026-86204
- **Severity:** HIGH
- **CVSS Score:** 7.1 (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)
- **CWE:** CWE-400
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 9, 2026

## Description

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.

## Affected Products

- pmmp — PocketMine-MP (0)
- pmmp — PocketMine-MP (5.39.2)

## References

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._