CVE-2026-54842

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:github_m, epss, ghsa
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 0

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

Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly...

Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly Configured Access Control Security Levels.

This issue affects Royal MCP: from n/a through 1.4.25.

CVSS v3
8.1
EG Score
8.1(high)
EPSS
9.4%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 25, 2026

Vendor Advisories for CVE-2026-54842(1)

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

Frequently asked(5)

What is CVE-2026-54842?
CVE-2026-54842 is a high vulnerability published on June 25, 2026. Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly... Missing Authorization vulnerability in Royal Plugins Royal MCP allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Royal MCP: from n/a through 1.4.25.
When was CVE-2026-54842 disclosed?
CVE-2026-54842 was first published in the National Vulnerability Database on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54842 actively exploited?
CVE-2026-54842 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54842?
CVE-2026-54842 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-54842?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54842, 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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