{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.39.2"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a6ced39472135aacb64cd75b06c5adb452b9db20"
            },
            {
              "fixed": "c0719b76b18f2508143134e79bc9f1aa39109683"
            }
          ],
          "repo": "https://github.com/pmmp/pocketmine-mp",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f9jp-856v-8642"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-664"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86203.json"
  },
  "details": "PocketMine-MP versions before 5.39.2 fail to validate entity despawn state when processing attack packets from clients. Attackers can exploit a race condition by attacking a disconnecting player to trigger multiple death handlers, causing inventory items and experience to drop multiple times for duplication.",
  "id": "CVE-2026-86203",
  "modified": "2026-09-12T03:30:24.476038844Z",
  "published": "2026-09-09T13:32:04.400Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86203.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-f9jp-856v-8642"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86203"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-item-duplication-via-despawn-state"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PocketMine-MP before 5.39.2 Item Duplication via Despawn State"
}