CVE-2026-86200
MEDIUMDescription
PocketMine-MP versions before 5.42.1 contain a denial of service vulnerability in the LoginPacket handler that allows remote attackers to flood warning messages by injecting numerous junk properties into the clientData JWT. Attackers can craft malicious login packets with excessive unknown properties to waste server CPU time and degrade performance.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 39% of all known CVEs.
References
Related Vulnerabilities
Other CWE-779 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-36416 | High | 8.6 | 2.0% | - | Fix |
| CVE-2024-36072 | Critical | 9.8 | 1.0% | - | - |
| CVE-2022-31004 | High | 7.5 | 1.0% | - | - |
| CVE-2025-51397 | Medium | 5.4 | 0.9% | - | - |
| CVE-2024-55628 | High | 7.5 | 0.7% | - | Fix |
| CVE-2023-23949 | Medium | 5.4 | 0.6% | - | - |
Common questions
How do I fix CVE-2026-86200?
No published fix for CVE-2026-86200 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-86200 being actively exploited?
Not that we know of. CVE-2026-86200 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.47% is the estimated probability that it will be exploited in the next 30 days. That is higher than 39% of all scored CVEs.
How severe is CVE-2026-86200?
CVE-2026-86200 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-18.