CVE-2026-86201

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

PocketMine-MP before 5.41.1 contains a denial of service vulnerability in LoginPacket processing where large or complex structures in unknown clientData JWT properties cause excessive logging without sanitization. Attackers can send crafted LoginPackets with deeply nested or massive object structures to trigger out-of-memory conditions and crash the server.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 14, 2026

Advisory Details (3)

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

PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-5.41.1-logdos-via-loginpacket-clientdata
github_commit

commit 87d1c0cea09d (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit 87d1c0cea09d — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/87d1c0cea09d972fd4c2fafb84dac2ecab7649f0
github Patch Available🟡 PoC Available

LogDoS by large complex unknown property logging in clientData in LoginPacket · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h6rj-3m53-887h

Vendor Advisories for CVE-2026-86201(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 (381 versions)5.41.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 43× 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 21:20 UTCEG score recompute
  2. 2026-09-18 21:20 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 09:45 UTCGHSA enrichment
  5. 2026-09-17 22:21 UTCEG score recompute
  6. 2026-09-17 22:20 UTCGHSA enrichment
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-17 10:56 UTCGHSA enrichment
  9. 2026-09-16 23:32 UTCEG score recompute
  10. 2026-09-16 23:32 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 12:07 UTCEG score recompute
  13. 2026-09-16 12:07 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-16 00:43 UTCGHSA enrichment
  16. 2026-09-15 13:19 UTCEG score recompute
  17. 2026-09-15 13:19 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 01:55 UTCGHSA enrichment
  21. 2026-09-14 14:31 UTCEG score recompute
  22. 2026-09-14 14:31 UTCGHSA enrichment
  23. 2026-09-14 13:36 UTCEG score recompute
  24. 2026-09-14 13:36 UTCGHSA enrichment
  25. 2026-09-14 03:20 UTCEG score recompute
Show 18 more
  1. 2026-09-14 03:20 UTCGHSA enrichment
  2. 2026-09-13 15:56 UTCGHSA enrichment
  3. 2026-09-13 04:32 UTCGHSA enrichment
  4. 2026-09-12 17:08 UTCEG score recompute
  5. 2026-09-12 17:08 UTCGHSA enrichment
  6. 2026-09-12 05:44 UTCGHSA enrichment
  7. 2026-09-11 18:20 UTCEG score recompute
  8. 2026-09-11 18:20 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 06:55 UTCGHSA enrichment
  12. 2026-09-10 19:31 UTCGHSA enrichment
  13. 2026-09-10 08:06 UTCGHSA enrichment
  14. 2026-09-09 20:41 UTCEG score recompute
  15. 2026-09-09 20:41 UTCGHSA enrichment
  16. 2026-09-09 14:27 UTCEG score recompute
  17. 2026-09-09 13:46 UTCEG score recompute
  18. 2026-09-09 13:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86201?
CVE-2026-86201 is a high vulnerability published on September 9, 2026. PocketMine-MP before 5.41.1 contains a denial of service vulnerability in LoginPacket processing where large or complex structures in unknown clientData JWT properties cause excessive logging without sanitization. Attackers can send crafted LoginPackets with deeply nested or massive object…
When was CVE-2026-86201 disclosed?
CVE-2026-86201 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86201 actively exploited?
CVE-2026-86201 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 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86201?
CVE-2026-86201 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-86201?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86201, 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-2026-86201

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