CVE-2026-86199Public exploitNetwork attack vector

Server crash via uninitialized Certificate field access

Published Sep 9, 2026 · Updated Sep 9, 2026

Denial of service in PMMP PocketMine-MP 5.43.0 allows remote attackers to crash the server through an unauthenticated login. AuthenticationInfo accesses its Certificate typed property after an offline client omits that field, leaving the property uninitialized. The failure occurs before rejection even when offline mode is disabled, and repeated connections can repeatedly interrupt the server.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in PMMP PocketMine-MP 5.43.0 allows remote attackers to crash the server through an unauthenticated login. AuthenticationInfo accesses its Certificate typed property after an offline client omits that field, leaving the property uninitialized. The failure occurs before rejection even when offline mode is disabled, and repeated connections can repeatedly interrupt the server.

The record

CVE
CVE-2026-86199
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
PMMP
Product
PocketMine-MP
Classifications
CWE-184, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.43.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PMMP · PocketMine-MPversion=0 <5.43.1

Published CVSS scores

7.5PMMPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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