CVE-2026-111958

{
  "etk_id": "ETK-2026-2433",
  "cve_id": "CVE-2026-111958",
  "display_id": "CVE-2026-111958",
  "ghsa_id": "GHSA-5h77-wc4p-vj34",
  "euvd_id": "EUVD-2026-108015",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Preview-token authentication bypass in Royal MCP",
  "summary": "Royal MCP versions before 1.5.7 may accept a preview-link token as authentication for REST API requests outside the preview it was created for. An attacker who obtains a valid token can act as its associated user; this can result in administrative control when that user has administrator privileges by default.",
  "mitigation": "Upgrade Royal MCP to version 1.5.7 or later. Until upgrades are complete, restrict creation and sharing of preview tokens, ensure token-owning accounts use least privilege, and review REST API exposure.",
  "vendor": null,
  "product": "Royal MCP",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 1.5.7"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.5.7"
      ],
      "package_name": "Royal MCP",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 20.024948016666666,
  "t0_at": "2026-10-22T06:00:17.950000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-22T12:13:19.181185+00:00",
      "days": 0.25904202760416667,
      "is_lower_bound": false,
      "measured_at": "2026-10-22T06:00:17.950000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-22T06:00:17.950000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-22T06:00:17.950000+00:00",
      "url": "https://github.com/advisories/GHSA-5h77-wc4p-vj34"
    }
  }
}