CVE-2026-106455

{
  "etk_id": "ETK-2026-811",
  "cve_id": "CVE-2026-106455",
  "display_id": "CVE-2026-106455",
  "ghsa_id": "GHSA-q38j-6vcm-2f5m",
  "euvd_id": "EUVD-2026-93986",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper MkDocs plugin validation in Backstage TechDocs",
  "summary": "@backstage/plugin-techdocs-node improperly validates MkDocs plugin configuration used by TechDocs builds. An authenticated user able to modify a TechDocs source repository can cause a build worker to access and publish data from network services it can reach. Impact depends on the builder's network placement and protections on the destination service.",
  "mitigation": "Upgrade @backstage/plugin-techdocs-node to 1.14.7 or later on the 1.14.x line, or 1.15.5 or later on the 1.15.x line. Limit TechDocs repository and catalog-registration permissions, and block documentation builders from private and link-local network ranges.",
  "vendor": "backstage",
  "product": "backstage",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.11.12, < 1.14.7"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.14.7"
      ],
      "package_name": "@backstage/plugin-techdocs-node",
      "purl": "pkg:npm/@backstage/plugin-techdocs-node"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.15.0, < 1.15.5"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.15.5"
      ],
      "package_name": "@backstage/plugin-techdocs-node",
      "purl": "pkg:npm/@backstage/plugin-techdocs-node"
    }
  ],
  "cwes": [
    918
  ],
  "cvss_score": 7.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
  "epss_score": 0.0033,
  "epss_percentile": 0.2503,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 15.260690666666667,
  "t0_at": "2026-10-06T20:06:06.505000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-06T20:06:06.505000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-06T20:06:06.505000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-106455"
    }
  }
}