CVE-2026-111911

{
  "etk_id": "ETK-2026-1907",
  "cve_id": "CVE-2026-111911",
  "display_id": "CVE-2026-111911",
  "ghsa_id": "GHSA-768h-xwv2-fwp3",
  "euvd_id": "EUVD-2026-103309",
  "status": "published",
  "anchor_state": "anchored",
  "title": "WebAuthn registration authentication bypass in phpMyFAQ",
  "summary": "phpMyFAQ 4.0.0 through 4.1.8 mishandles authentication during WebAuthn credential enrollment. A remote unauthenticated attacker may associate a credential with a targeted account and subsequently access that account, provided the attacker can target its username and the vulnerable registration functionality is exposed.",
  "mitigation": "Upgrade phpMyFAQ to version 4.1.9 or later. Until upgrades are complete, restrict access to WebAuthn registration endpoints and monitor for unexpected credential enrollments.",
  "vendor": "thorsten",
  "product": "phpMyFAQ",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=4.1.8"
      ],
      "ecosystem": "composer",
      "fixed_versions": [
        "4.1.9"
      ],
      "package_name": "phpmyfaq/phpmyfaq",
      "purl": "pkg:composer/phpmyfaq/phpmyfaq"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0042,
  "epss_percentile": 0.3537,
  "epss_asof": "2026-10-21",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 141.00496815,
  "t0_at": "2026-10-17T18:46:28.833000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T22:47:18.656757+00:00",
      "days": 0.16724333052083334,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-03T11:38:28+00:00",
      "days": -14.297231863425926,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-g6cq-6rqg-6c9p"
    },
    "trigger_signal": {
      "at": "2026-10-17T18:46:28.833000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T18:46:28.833000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111911"
    }
  }
}