CVE-2026-63438

{
  "etk_id": "ETK-2026-3757",
  "cve_id": "CVE-2026-63438",
  "display_id": "CVE-2026-63438",
  "ghsa_id": "GHSA-r9xx-45m8-mw24",
  "euvd_id": "EUVD-2026-118491",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper reverse-proxy authentication in 2FAuth",
  "summary": "2FAuth releases before 8.0.0 are affected when reverse-proxy-guard accepts authentication headers from clients that have not passed through a trusted proxy. An unauthenticated remote attacker could create an administrator account on a new installation or misuse an existing account identity, potentially exposing 2FA secrets and administrative features.",
  "mitigation": "Upgrade 2FAuth to version 8.0.0. Until upgraded, ensure authentication headers are accepted only from explicitly trusted reverse proxies and cannot be supplied directly by clients.",
  "vendor": "Bubka",
  "product": "2FAuth",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=7.0.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "8.0.0"
      ],
      "package_name": null,
      "purl": null
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 21.721757516666667,
  "t0_at": "2026-11-06T20:20:27.407000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-06T20:20:27.407000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-06T20:20:27.407000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-63438"
    }
  }
}