ETK-2026-3419Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3419",
  "cve_id": null,
  "display_id": "ETK-2026-3419",
  "ghsa_id": "GHSA-q747-mqgr-4gh7",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Unverified phone-number account binding in better-auth",
  "summary": "Deployments using the better-auth phone-number plugin are affected by improper handling of unverified phone numbers; installations without a custom verifyOTP function may also have OTP-record isolation issues. An attacker may associate another person's phone number with an attacker-controlled account, causing a later legitimate phone sign-in to create a session for that account; the OTP itself is not bypassed. The attacker must be able to submit a phone number through an affected public flow before it is verified.",
  "mitigation": "Upgrade better-auth to 1.7.16, or to 1.8.0-beta.5 on the beta release line. If adopting 1.7.16, remove phone numbers that were stored without verification and prevent public flows from saving phone numbers before verification.",
  "vendor": "npm",
  "product": "better-auth",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.4.12-beta.7, < 1.7.16"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.7.16"
      ],
      "package_name": "better-auth",
      "purl": "pkg:npm/better-auth"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.8.0-beta.0, < 1.8.0-beta.5"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.8.0-beta.5"
      ],
      "package_name": "better-auth",
      "purl": "pkg:npm/better-auth"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 8.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.1089863,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-11-03T21:37:45+00:00",
      "days": -0.7659087182060185,
      "is_lower_bound": true,
      "measured_at": "2026-11-04T16:00:39.548933+00:00",
      "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-q747-mqgr-4gh7"
    }
  }
}