CVE-2026-86204CWE-400denial-of-service

CVE-2026-86204

Medium · published September 9, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
36.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
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
EPSS
0.00436 · 36.8th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-09-09T18:17Z
References (3)
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff · [email protected]https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-denial-of-service-via-modalformresponsepacket · [email protected]https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 09 SEP 13:32Z
    PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket
    cvelistv5