{"id":"CVE-2026-86203","summary":"PocketMine-MP before 5.39.2 Item Duplication via Despawn State","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.","aliases":["GHSA-f9jp-856v-8642"],"modified":"2026-09-10T03:48:25.535862024Z","published":"2026-09-09T13:32:04.400Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86203.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-664"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86203.json"},{"type":"FIX","url":"https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683"},{"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pmmp/pocketmine-mp","events":[{"introduced":"0"},{"fixed":"a6ced39472135aacb64cd75b06c5adb452b9db20"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"5.39.2"}],"source":"AFFECTED_FIELD"}}],"versions":["5.39.1","5.39.0","5.38.0","5.37.3","5.37.2","5.37.1","5.37.0","5.36.0","5.35.1","5.35.0","5.34.1","5.34.0","5.33.2","5.33.1","5.33.0","5.32.1","5.32.0","5.31.0","5.30.1","5.30.0","5.29.0","5.28.2","5.28.1","5.28.0","5.27.1","5.27.0","5.26.0","5.25.2","5.25.1","5.25.0","5.24.0","5.23.3","5.23.2","5.23.1","5.23.0","5.22.0","5.21.2","5.21.1","5.21.0","5.20.1","5.20.0","5.16.0","5.15.0","5.14.1","5.14.0","5.13.0","5.12.1","5.12.0","5.11.2","5.11.1","5.11.0","5.10.0","5.9.0","5.8.2","5.8.1","5.7.1","5.7.0","5.6.1","5.6.0","5.5.0","5.4.4","5.4.3","5.4.2","5.4.1","5.4.0","5.3.4","5.3.3","5.3.2","5.3.1","5.3.0","5.2.1","5.2.0","5.1.3","5.1.2","5.1.1","5.1.0","5.0.1","5.0.0","4.21.1","4.20.4","4.21.0","4.20.3","4.20.2","4.20.1","4.20.0","4.19.3","4.19.2","4.19.1","4.19.0","4.18.0","4.18.0-ALPHA2","4.18.0-ALPHA1","4.16.0","4.15.3","4.15.2","4.15.1","4.15.0","4.14.1","4.14.0","4.13.0","4.12.10","4.12.9","4.12.8","4.12.7","4.12.6","4.12.5","4.12.4","4.12.3","4.12.2","4.12.1","4.12.0","4.10.2","4.10.1","4.10.0","4.9.1","4.9.0","4.8.1","4.8.0","4.7.3","4.7.2","4.7.1","4.7.0","4.6.2","4.6.1","4.6.0","4.5.2","4.5.1","4.5.0","4.4.2","4.4.1","4.4.0","4.4.0-BETA1","4.1.0-BETA2","4.1.0-BETA1","4.0.0","3.26.1","3.26.0","3.25.6","3.25.5","3.25.4","3.25.3","3.25.2","3.25.1","3.25.0","3.24.0","3.23.1","3.23.0","3.22.5","3.22.4","3.22.3","3.22.2","3.22.1","3.22.0","3.21.1","3.21.0","3.20.0","3.19.3","3.19.2","3.19.1","3.18.2","3.19.0","3.18.1","3.17.7","3.18.0","3.17.6","3.17.5","3.17.4","3.17.3","3.17.2","3.17.1","3.17.0","3.16.1","3.16.0","3.15.4","3.15.3","3.15.2","3.15.1","3.15.0","3.14.3","3.14.2","3.14.1","3.14.0","3.13.1","3.13.0","3.12.6","3.12.5","3.12.4","3.12.3","3.12.2","3.12.1","3.11.7","3.12.0","3.11.6","3.11.5","3.11.4","3.11.3","3.11.2","3.11.1","3.10.1","3.11.0","3.9.8","3.10.0","3.9.7","3.9.6","3.9.5","3.9.4","3.9.3","3.9.2","3.9.1","3.9.0","3.8.7","3.8.6","3.8.5","3.8.4","3.8.3","3.8.2","3.8.1","3.8.0","3.7.3","3.7.2","3.7.1","3.7.0","3.6.5","3.6.4","3.6.3","3.6.2","3.6.1","3.6.0","3.5.10","3.5.9","3.5.8","3.5.7","3.5.6","3.5.5","3.5.4","3.5.3","3.5.2","3.5.1","3.5.0","3.4.1","3.4.0","3.2.0","3.0.2","3.0.1","3.0.0","api/3.0.0-ALPHA12","1.7dev-937","api/3.0.0-ALPHA11","1.7dev-677","api/3.0.0-ALPHA10","1.7dev-501","api/3.0.0-ALPHA8","1.7dev-83","api/3.0.0-ALPHA6","1.6.2dev-229","api/3.0.0-ALPHA4","api/3.0.0-ALPHA3","api/3.0.0-ALPHA2","api/3.0.0-ALPHA1","api/2.1.0","1.6.1dev-87","api/2.0.0","1.6dev","api/1.11.0","1.4.1","1.4.1dev-936","1.4-916","1.4","Alpha_1.4dev-900","Alpha_1.4dev-855","Alpha_1.4dev-847","Alpha_1.4dev-842","Alpha_1.4dev-834","Alpha_1.4dev-707","Alpha_1.4dev-665","Alpha_1.4dev-659","Alpha_1.4dev-599","Alpha_1.4dev-576","Alpha_1.4dev-491","Alpha_1.4dev-478","Alpha_1.4dev-449","Alpha_1.4dev-413","Alpha_1.4dev-277","Alpha_1.4dev-228","Alpha_1.3.10","Alpha_1.3.9","Alpha_1.3.8","Alpha_1.3.7","Alpha_1.3.5","Alpha_1.3.4","Alpha_1.3.3","Alpha_1.3.2","Alpha_1.3.1","Alpha_1.3","Alpha_1.2.1","Alpha_1.2","Alpha_1.1.1","Alpha_1.1","Alpha_1.0.8","Alpha_1.0.7","Alpha_1.0.6","Alpha_1.0.5","Alpha_1.0.4","Alpha_1.0.3","Alpha_1.0.2","Alpha_1.0.1","Alpha_1.0","pocketmine-mp-rebrand"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86203.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}