Royal MCP: A security weakness
Royal MCP is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is n/a through 1.4.2.
- Component
- Royal MCP
- Plugin slug
royal-mcp- Affected
- n/a through 1.4.2
- Safe version
1.4.3- Published
- Jun 15, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Jun 15, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
Update Royal MCP to 1.4.3 or later, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Unauthenticated Broken Access Control in Royal MCP <= 1.4.2 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L