EUVD-2026-74915
GHSA-323m-6rhr-p53j
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
Network-delivered by any authenticated player (AV:N, PR:L); no special configuration required (AC:L); pure availability impact with no confidentiality or integrity consequence (C:N/I:N/A:H).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
PocketMine-MP versions before 5.39.2 fail to limit JSON payload size in ModalFormResponsePacket handling, allowing authenticated players to cause denial of service. Attackers can send modal form response packets with massive JSON arrays to exhaust server memory and CPU resources, rendering the server unresponsive.
AnalysisAI
Memory and CPU exhaustion in PocketMine-MP before 5.39.2 allows any authenticated in-game player to render the game server unresponsive by sending a ModalFormResponsePacket with an arbitrarily large JSON payload. The server processes incoming form response data without enforcing any size limit, enabling an attacker to exhaust server memory and CPU with JSON arrays containing millions of elements. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a fully established player session on the target server - specifically, the player must have completed the spawn sequence and entered the game world, as ModalFormResponsePacket handling is skipped for players who have not yet spawned. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H, score 7.1) appropriately reflects that a low-privileged network attacker - any authenticated player - can achieve high availability impact with minimal complexity. … 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 PocketMine-MP to version 5.39.2 or later, which contains two targeted fixes per the vendor advisory GHSA-788v-5pfp-93ff: commit cef1088341e40ee7a6fa079bca47a84f3524d877 enforces a 10 KB maximum size on form response payloads, and commit f983f4f66d5e72d7a07109c8175799ab0ee771d5 skips JSON decoding entirely when no form matching the submitted ID is active for the requesting player. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all PocketMine-MP deployments to identify instances running versions before 5.39.2; given that publicly available exploit code exists, consider temporary player access restrictions on critical servers if patching cannot proceed immediately. …
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External POC / Exploit Code
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