CVE-2026-106558

{
  "etk_id": "ETK-2026-883",
  "cve_id": "CVE-2026-106558",
  "display_id": "CVE-2026-106558",
  "ghsa_id": "GHSA-qmw3-745m-w99g",
  "euvd_id": "EUVD-2026-94371",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper configuration validation in Backstage TechDocs",
  "summary": "@backstage/plugin-techdocs-node improperly validates certain TechDocs documentation configuration, which can allow code to run in the generator runtime. An authenticated attacker must be able to register or influence an SCM-backed documentation source; risk is higher where generation has credentials, filesystem access, or internal network access.",
  "mitigation": "Upgrade @backstage/plugin-techdocs-node to 1.14.8, 1.15.6, or 2.0.1, as appropriate for the deployed release line; do not rely on 1.15.4 alone. Until upgraded, isolate external TechDocs generation from sensitive credentials and host access, and restrict and review documentation configuration changes.",
  "vendor": "backstage",
  "product": "backstage",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 1.15.4"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.15.4"
      ],
      "package_name": "@backstage/plugin-techdocs-node",
      "purl": "pkg:npm/@backstage/plugin-techdocs-node"
    }
  ],
  "cwes": [
    502
  ],
  "cvss_score": 8.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0047,
  "epss_percentile": 0.3957,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 19.997066166666666,
  "t0_at": "2026-10-07T14:45:25.679000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-07T15:56:45.734545+00:00",
      "days": 0.04953767991898148,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T14:45:25.679000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-07T14:45:25.679000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T14:45:25.679000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-106558"
    }
  }
}