{"id":"CVE-2026-86204","title":"PocketMine-MP versions before 5.39.2 fail to limit JSON payload size in ModalFormResponsePacket handling, allowing authenticated players to cause denial of service","summary":"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 …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400"],"vendor":"pmmp","product":"PocketMine-MP","affected":["PocketMine-MP < 5.39.2"],"published":"2026-09-09","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:20:21.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86204","references":[{"url":"https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-denial-of-service-via-modalformresponsepacket","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-788v-5pfp-93ff","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-09T14:18:46.084735Z"},"ingestedAt":"2026-09-09T14:11:29.380Z","epss":0.00371,"epssPercentile":0.30965,"slug":"CVE-2026-86204","body":"## Overview\n\nPocketMine-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":18329,"id":"CVE-2026-86204","ts":1788966798859,"field":"exploit_available","old":"false","new":"true"}]}