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Vulnerability record · CVE-2026-86199 · published 9 September 2026

CVE-2026-86199: PocketMine-MP versions before 5.43.1 fail to properly validate the Certificate field during offline login auth…

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.

8.7 CVSS 4.0 High EPSS 0.47% · top 62.1% CWE-184 · CWE-184 Deferred
8.7CVSS 4.0 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:

References

LinkTags
https://github.com/pmmp/PocketMine-MP/commit/8c75a1d739e8e190d3cc2338b25cebcc9c052b1b
https://github.com/pmmp/PocketMine-MP/commit/e4aaef4ee0f769b52dc0347a1d6da403b9691115
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g2fj-p69p-9chp
https://www.vulncheck.com/advisories/pocketmine-mp-before-5.43.1-denial-of-service-via-unauthenticated-login
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g2fj-p69p-9chp

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-86199), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.