CVE-2026-86199

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 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.

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
25%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (4)

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

PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-5.43.1-denial-of-service-via-unauthenticated-login
github_commit

commit 8c75a1d739e8 (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit 8c75a1d739e8 — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/8c75a1d739e8e190d3cc2338b25cebcc9c052b1b
github_commit

commit e4aaef4ee0f7 (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit e4aaef4ee0f7 — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/e4aaef4ee0f769b52dc0347a1d6da403b9691115
github Patch Available🟡 PoC Available

Improper handling of new offline login flow · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-g2fj-p69p-9chp

Vendor Advisories for CVE-2026-86199(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 42× 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. 2026-09-19 09:04 UTCGHSA enrichment
  2. 2026-09-18 22:14 UTCEG score recompute
  3. 2026-09-18 22:14 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 11:24 UTCGHSA enrichment
  6. 2026-09-18 00:33 UTCEG score recompute
  7. 2026-09-18 00:33 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 13:42 UTCGHSA enrichment
  10. 2026-09-17 02:51 UTCGHSA enrichment
  11. 2026-09-16 15:57 UTCEG score recompute
  12. 2026-09-16 15:57 UTCGHSA enrichment
  13. 2026-09-16 14:09 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-16 05:07 UTCGHSA enrichment
  16. 2026-09-15 18:16 UTCGHSA enrichment
  17. 2026-09-15 06:49 UTCEG score recompute
  18. 2026-09-15 06:49 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 19:58 UTCGHSA enrichment
  22. 2026-09-14 09:08 UTCGHSA enrichment
  23. 2026-09-13 22:18 UTCEG score recompute
  24. 2026-09-13 22:18 UTCGHSA enrichment
  25. 2026-09-13 11:28 UTCGHSA enrichment
Show 17 more
  1. 2026-09-13 00:38 UTCEG score recompute
  2. 2026-09-13 00:38 UTCGHSA enrichment
  3. 2026-09-12 13:48 UTCGHSA enrichment
  4. 2026-09-12 02:58 UTCGHSA enrichment
  5. 2026-09-11 16:07 UTCEG score recompute
  6. 2026-09-11 16:07 UTCGHSA enrichment
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 05:14 UTCGHSA enrichment
  10. 2026-09-10 18:24 UTCGHSA enrichment
  11. 2026-09-10 07:31 UTCGHSA enrichment
  12. 2026-09-09 20:41 UTCEG score recompute
  13. 2026-09-09 20:41 UTCGHSA enrichment
  14. 2026-09-09 15:29 UTCEG score recompute
  15. 2026-09-09 14:20 UTCEG score recompute
  16. 2026-09-09 13:46 UTCEG score recompute
  17. 2026-09-09 13:44 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86199?
CVE-2026-86199 is a high vulnerability published on September 9, 2026. 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.
When was CVE-2026-86199 disclosed?
CVE-2026-86199 was first published in the National Vulnerability Database on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86199 actively exploited?
CVE-2026-86199 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 75.2% of all scored CVEs.
What is the CVSS score of CVE-2026-86199?
CVE-2026-86199 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-86199?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86199, 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

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