EUVD-2026-74914
GHSA-9pw9-9mpc-9mc3
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Race condition requires precise timing (AC:H); any server player can attack without privileges (PR:N); impact is game-economy integrity only (I:L), with no confidentiality or availability consequence.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Item and experience duplication in PocketMine-MP before 5.39.2 allows any authenticated server player to exploit a race condition during another player's disconnection, causing inventory loot and XP to drop multiple times from a single death event. The InGamePacketHandler fetches entities via World->getEntity() without validating the flaggedForDespawn state, so the death handler can fire multiple times for the same disconnect-death event if a crafted attack packet arrives within the narrow timing window. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two human players on the same server: the victim (Player A) must be at exactly 1 HP so a single hit kills them, and must initiate a disconnect sequence (click 'Disconnect' or 'Exit to Menu'). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.3 with AV:N/AC:H/AT:P/PR:N/UI:N is an accurate reflection of real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to PocketMine-MP 5.39.2 or later, which patches all affected code paths (InGamePacketHandler.php, Player.php, ExperienceOrb.php, BaseSign.php) with explicit flaggedForDespawn checks; the authoritative fix commit is c0719b76b18f2508143134e79bc9f1aa39109683. … Detailed patch versions, workarounds, and compensating controls in full report. |
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