{"answers":{"affected":"2 open source packages ship an affected version, including pocketmine/pocketmine-mp.","exploited":"There is no known exploitation of CVE-2026-86203 in the wild and no public exploit code.","fix":"Upgrade pocketmine/pocketmine-mp to 5.39.2 or later.","what":"CVE-2026-86203 is a medium-severity vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-86203 and fix it if it is affected.\n\nWhat it is: CVE-2026-86203 is a medium-severity vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-86203 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pocketmine/pocketmine-mp (Packagist): affected all versions; fixed in 5.39.2\n- pocketmine/pocketmine-mp (Packagist): affected all versions; fixed in 5.39.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-86203/ (Markdown: https://insights.sbomify.com/CVE-2026-86203/index.md)","id":"CVE-2026-86203","markdown":"https://insights.sbomify.com/CVE-2026-86203/index.md","name":"CVE-2026-86203","record":{"aliases":["GHSA-9pw9-9mpc-9mc3","GHSA-f9jp-856v-8642"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Minecraft server software","requires_auth":"none","summary":"Attackers can duplicate items and experience by exploiting a race condition in entity despawn handling, affecting PocketMine-MP server administrators.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-664","name":"Improper Control of a Resource Through its Lifetime"}],"description":"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.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"PocketMine-MP before 5.39.2 Item Duplication via Despawn State","id":"CVE-2026-86203","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket","id":"CVE-2026-86204"},"packages":[{"ecosystem":"Packagist","fixed":["5.39.2"],"introduced":["0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":null,"source":"GHSA-f9jp-856v-8642"},{"ecosystem":"Packagist","fixed":["5.39.2"],"introduced":["0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":"pkg:composer/pocketmine/pocketmine-mp","source":"GHSA-f9jp-856v-8642"}],"prev":{"headline":"PocketMine-MP before 5.39.2 Network Amplification via ActorEventPacket","id":"CVE-2026-86202"},"products":["PocketMine-MP"],"published":"2026-09-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["pmmp"]},"summary":"Attackers can duplicate items and experience by exploiting a race condition in entity despawn handling, affecting PocketMine-MP server administrators.","url":"https://insights.sbomify.com/CVE-2026-86203/"}