CVE-2026-86203: Improper Control of a Resource Through its Lifetime in pmmp PocketMine-MP
CVE-2026-86203 is a medium severity vulnerability in PocketMine-MP prior to version 5.39.2. It involves improper control of a resource through its lifetime due to failure to validate entity despawn state when processing attack packets. This allows attackers to exploit a race condition by attacking a disconnecting player, triggering multiple death handlers and causing duplication of inventory items and experience points.
AI Analysis
Technical Summary
PocketMine-MP versions before 5.39.2 do not properly validate the despawn state of entities when processing attack packets from clients. This flaw enables attackers to exploit a race condition by attacking a player who is disconnecting, which triggers multiple death handlers. As a result, inventory items and experience points can be duplicated multiple times. The vulnerability is identified as CVE-2026-86203 with a CVSS 4.0 base score of 6.3, indicating medium severity. No official patch or remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
Exploitation of this vulnerability can lead to duplication of inventory items and experience points in the game, potentially disrupting game balance and economy. There is no indication of remote code execution or privilege escalation. The impact is limited to in-game resource duplication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor vendor communications for updates. No temporary or official fixes are currently documented.
CVE-2026-86203: Improper Control of a Resource Through its Lifetime in pmmp PocketMine-MP
Description
CVE-2026-86203 is a medium severity vulnerability in PocketMine-MP prior to version 5.39.2. It involves improper control of a resource through its lifetime due to failure to validate entity despawn state when processing attack packets. This allows attackers to exploit a race condition by attacking a disconnecting player, triggering multiple death handlers and causing duplication of inventory items and experience points.
CVSS v4.0
Score 6.3medium
Affected software
pkg:github/pmmp/PocketMine-MPRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PocketMine-MP versions before 5.39.2 do not properly validate the despawn state of entities when processing attack packets from clients. This flaw enables attackers to exploit a race condition by attacking a player who is disconnecting, which triggers multiple death handlers. As a result, inventory items and experience points can be duplicated multiple times. The vulnerability is identified as CVE-2026-86203 with a CVSS 4.0 base score of 6.3, indicating medium severity. No official patch or remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
Exploitation of this vulnerability can lead to duplication of inventory items and experience points in the game, potentially disrupting game balance and economy. There is no indication of remote code execution or privilege escalation. The impact is limited to in-game resource duplication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor vendor communications for updates. No temporary or official fixes are currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-05T11:52:36.822Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa164b2acd9273b49685904
Added to database: 09/09/2026, 13:52:50 UTC
Last enriched: 09/09/2026, 14:23:53 UTC
Last updated: 09/09/2026, 21:30:18 UTC
Views: 6
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