CVE-2026-86538

{
  "etk_id": "ETK-2026-500",
  "cve_id": "CVE-2026-86538",
  "display_id": "CVE-2026-86538",
  "ghsa_id": "GHSA-fpxv-c555-rhm3",
  "euvd_id": "EUVD-2026-72556",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in knowns template preview API",
  "summary": "The `knowns` npm package prior to 0.30.0 is affected by a path traversal flaw in the template preview API. An unauthenticated remote party may retrieve files accessible to the application when the endpoint is exposed.",
  "mitigation": "Upgrade `knowns` to version 0.30.0 or later. Restrict access to the template preview API until the upgrade is complete.",
  "vendor": "knowns-dev",
  "product": "knowns",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.29.1"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "0.30.0"
      ],
      "package_name": "knowns",
      "purl": "pkg:npm/knowns"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7.5,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss_score": 0.0098,
  "epss_percentile": 0.6193,
  "epss_asof": "2026-10-21",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 21.67329691666667,
  "t0_at": "2026-09-07T23:03:17.221000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-03T22:19:53.801502+00:00",
      "days": 25.969867829884258,
      "is_lower_bound": false,
      "measured_at": "2026-09-07T23:03:17.221000+00:00",
      "url": null
    },
    "kev": {
      "at": "2026-09-17T00:00:00+00:00",
      "days": 10,
      "is_lower_bound": false,
      "measured_at": "2026-09-07T23:03:17.221000+00:00",
      "precision": "day",
      "url": "https://vulncheck.com/cve/CVE-2026-86538"
    },
    "trigger_signal": {
      "at": "2026-09-17T00:00:00+00:00",
      "days": 9.039384016203703,
      "is_lower_bound": false,
      "measured_at": "2026-09-07T23:03:17.221000+00:00",
      "url": "https://vulncheck.com/cve/CVE-2026-86538"
    }
  }
}