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PatchSiren cyber security CVE debrief

CVE-2026-40775 Royal Plugins CVE debrief

CVE-2026-40775 is a HIGH severity vulnerability with a CVSS score of 7.3. It is an Unauthenticated Broken Access Control issue affecting Royal MCP plugin versions up to 1.4.2.

Vendor
Royal Plugins
Product
Royal MCP
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of Royal MCP plugin versions up to 1.4.2 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

CVE-2026-40775 is caused by an Unauthenticated Broken Access Control issue in Royal MCP plugin versions up to 1.4.2. The vulnerability has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L and is classified under CWE-862.

Defensive priority

HIGH

Recommended defensive actions

  • Update Royal MCP plugin to a version that fixes the Broken Access Control vulnerability.
  • Restrict access to sensitive areas of the plugin until an update is available.

Evidence notes

Evidence for this CVE comes from Patchstack, as indicated by the reference [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40775 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40775

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40775 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40775

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.