Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck
CVE-2026-86199PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login
High 7.5
In plain English
A high-severity security flaw in PocketMine-MP from pmmp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pmmp | PocketMine-MP | 0 – before 5.43.1 |
Weakness: CWE-184 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-g2fj-p69p-9chp) vendor-advisory
- Patch Commit patch
- Patch Commit patch
- VulnCheck Advisory: PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login third-party-advisory