CVE-2026-86200

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-09. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

PocketMine-MP before 5.42.1 LogDoS via LoginPacket clientData JWT | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-5.42.1-logdos-via-loginpacket-clientdata-jwt
github_commit

commit c1d4a813fb8c (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit c1d4a813fb8c — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/c1d4a813fb8c21bfd8b9affd040da864b794df71
github Patch Available🟡 PoC Available

LogDoS by many junk properties in client data JWT in `LoginPacket` · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-xp4f-g2cm-rhg7

Vendor Advisories for CVE-2026-86200(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pocketmine/pocketmine-mp3.0.0 ... 5.9.0 (383 versions)5.42.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 18:33 UTCEG score recompute
  3. 2026-09-18 18:33 UTCGHSA enrichment
  4. 2026-09-18 17:30 UTCEG score recompute
  5. 2026-09-18 17:30 UTCGHSA enrichment
  6. 2026-09-18 14:19 UTCEG score recompute
  7. 2026-09-18 14:18 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 15:01 UTCGHSA enrichment
  10. 2026-09-16 15:43 UTCEG score recompute
  11. 2026-09-16 15:43 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 16:27 UTCEG score recompute
  15. 2026-09-15 16:27 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 17:09 UTCGHSA enrichment
  19. 2026-09-13 17:52 UTCEG score recompute
  20. 2026-09-13 17:52 UTCGHSA enrichment
  21. 2026-09-12 18:35 UTCEG score recompute
  22. 2026-09-12 18:35 UTCGHSA enrichment
  23. 2026-09-11 19:18 UTCEG score recompute
  24. 2026-09-11 19:18 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 7 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 20:01 UTCGHSA enrichment
  3. 2026-09-09 20:42 UTCEG score recompute
  4. 2026-09-09 20:41 UTCGHSA enrichment
  5. 2026-09-09 14:27 UTCEG score recompute
  6. 2026-09-09 13:46 UTCEG score recompute
  7. 2026-09-09 13:44 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86200?
CVE-2026-86200 is a medium vulnerability published on September 9, 2026. 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…
When was CVE-2026-86200 disclosed?
CVE-2026-86200 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86200 actively exploited?
CVE-2026-86200 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.4% of all scored CVEs.
What is the CVSS score of CVE-2026-86200?
CVE-2026-86200 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-86200?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86200, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-86200

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