Denial of Service Vulnerability in PocketMine-MP by PocketMine Team
CVE-2026-86201

8.7HIGH

Key Information:

Vendor

Pmmp

Status
Pocketmine-mp
Vendor
CVE Published:
9 September 2026

What is CVE-2026-86201?

PocketMine-MP prior to version 5.41.1 is susceptible to a denial of service vulnerability during the processing of LoginPacket. Attackers can exploit this flaw by sending large or complex data structures within clientData JWT properties, leading to excessive logging without proper sanitization. This results in out-of-memory conditions, which can crash the server, affecting availability and performance.

Affected Version(s)

PocketMine-MP 0 < 5.41.1

PocketMine-MP 5.41.1

References

https://github.com/pmmp/PocketMine-MP/security/advisories...
vendor-advisory
https://github.com/pmmp/PocketMine-MP/commit/87d1c0cea09d...
patch
https://www.vulncheck.com/advisories/pocketmine-mp-before...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

ArkadiaEU
dktapps
.