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TI-2026-58993 Aliases CVE-2026-86204GHSA-323m-6rhr-p53j

PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket

Priority MEDIUM 64CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00436 38th percentileScored 2026-11-07
Fix Fixed PocketMine-MP (pmmp): 5.39.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pmmpPocketMine-MPbefore 5.39.25.39.2Patch availableCNA
  • PocketMine-MP Vendorpmmp Affected before 5.39.2 Fixed in 5.39.2 Patch available CNA

Remediation

  • Fix · CNA PocketMine-MP (pmmp) Fixed in 5.39.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    pmmp PocketMine-MP 5.39.2

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-58992 PocketMine-MP before 5.39.2 Item Duplication via Despawn StatePriority LOW 28
    • TI-2026-58991 PocketMine-MP before 5.39.2 Network Amplification via ActorEventPacketPriority LOW 24
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86204
  2. 2026-10-03 Alias added: GHSA-323m-6rhr-p53j

References

Advisory 1

  • TI-2026-58990 PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData CVSS 4.0HIGH 8.7
  • TI-2026-58988 PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login CVSS 4.0HIGH 8.7
  • TI-2024-38460 PocketMine-MP before 5.11.1 Denial of Service via LoginPacket CVSS 4.0HIGH 8.7
  • TI-2023-30643 PocketMine-MP before 4.20.5 Denial of Service via LoginPacket CVSS 4.0HIGH 8.7
  • TI-2023-30640 PocketMine-MP before 5.3.1 Denial of Service via LoginPacket CVSS 4.0HIGH 8.7
  • TI-2022-26446 PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data CVSS 4.0HIGH 8.7
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences