Denial of Service Vulnerability in PocketMine-MP by PocketMine Team
CVE-2026-86199

8.7HIGH

Key Information:

Vendor

Pmmp

Status
Pocketmine-mp
Vendor
CVE Published:
9 September 2026

What is CVE-2026-86199?

PocketMine-MP versions prior to 5.43.1 have a vulnerability that arises due to improper validation of the Certificate field during offline login attempts. This flaw enables unauthenticated users to exploit the system, leading to an uninitialized property access error. Consequently, this can result in a server crash, rendering it unavailable for legitimate players. It's critical for users to update to the latest version to mitigate this risk.

Affected Version(s)

PocketMine-MP 0 < 5.43.1

PocketMine-MP 5.43.1

References

https://github.com/pmmp/PocketMine-MP/security/advisories...
vendor-advisory
https://github.com/pmmp/PocketMine-MP/commit/e4aaef4ee0f7...
patch
https://github.com/pmmp/PocketMine-MP/commit/8c75a1d739e8...
patch

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

kostamax27
dktapps
.