CVE-2026-106492

{
  "etk_id": "ETK-2026-835",
  "cve_id": "CVE-2026-106492",
  "display_id": "CVE-2026-106492",
  "ghsa_id": "GHSA-cq7v-rfgc-5c7v",
  "euvd_id": "EUVD-2026-94012",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Service credential restriction bypass in @backstage/backend-defaults",
  "summary": "Affected @backstage/backend-defaults deployments may fail to retain restrictions assigned to delegated service credentials. An external service using a restricted credential could perform plugin operations outside its intended permissions, provided it can reach the relevant Backstage backend delegation paths.",
  "mitigation": "Upgrade @backstage/backend-defaults to version 0.17.8. Until upgrading, limit backend API access to trusted callers and replace restricted shared credentials with purpose-specific credentials used only by trusted consumers.",
  "vendor": "backstage",
  "product": "backstage",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 0.17.8"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "0.17.8"
      ],
      "package_name": "@backstage/backend-defaults",
      "purl": "pkg:npm/@backstage/backend-defaults"
    }
  ],
  "cwes": [
    269
  ],
  "cvss_score": 7.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
  "epss_score": 0.0024,
  "epss_percentile": 0.1406,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 13.341758183333333,
  "t0_at": "2026-10-06T20:48:05.896000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-06T20:48:05.896000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-06T20:48:05.896000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-106492"
    }
  }
}