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TI-2026-58988 Aliases CVE-2026-86199GHSA-vmpr-x88w-pmm6

PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login

Priority HIGH 77CWE-184Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

PocketMine-MP versions before 5.43.1 fail to properly validate the Certificate field during offline login authentication. Unauthenticated players can trigger an uninitialized property access error that crashes the server.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00467 40th percentileScored 2026-11-07
Fix Fixed PocketMine-MP (pmmp): 5.43.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 5.43.15.43.1Patch availableCNA
  • PocketMine-MP Vendorpmmp Affected before 5.43.1 Fixed in 5.43.1 Patch available CNA

Remediation

  • Fix · CNA PocketMine-MP (pmmp) Fixed in 5.43.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86199
  2. 2026-10-03 Alias added: GHSA-vmpr-x88w-pmm6

References

Patch 2

Advisory 1

  • TI-2026-58990 PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData CVSS 4.0HIGH 8.7
  • TI-2026-58993 PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket CVSS 4.0HIGH 7.1
  • 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