CVE-2026-110862

{
  "etk_id": "ETK-2026-1612",
  "cve_id": "CVE-2026-110862",
  "display_id": "CVE-2026-110862",
  "ghsa_id": "GHSA-965c-763c-88jm",
  "euvd_id": "EUVD-2026-101745",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authentication bypass in better-auth OAuth and Magic Link handling",
  "summary": "better-auth versions from 1.4.0-beta.18 before 1.7.7 are affected by an authentication bypass involving OAuth and Magic Link token handling. An unauthenticated attacker may obtain a session as another user or create an account treated as email-verified when the affected sign-in flows are enabled.",
  "mitigation": "Upgrade better-auth to version 1.7.7 or later. Until upgrading, reduce exposure by disabling the affected OAuth or Magic Link sign-in flows where operationally feasible.",
  "vendor": "better-auth",
  "product": "better-auth",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.4.0-beta.18, < 1.7.7"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.7.7"
      ],
      "package_name": "better-auth",
      "purl": null
    }
  ],
  "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:N/SC:N/SI:N/SA:N",
  "epss_score": 0.0032,
  "epss_percentile": 0.237,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "mechanism_verified",
  "exploit": false,
  "pipeline_minutes": 27.80964185,
  "t0_at": "2026-10-14T22:52:46.811000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-02T18:14:37.580000+00:00",
      "days": -12.193162395833333,
      "is_lower_bound": false,
      "measured_at": "2026-10-14T22:52:46.811000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-30T21:31:02+00:00",
      "days": -14.056768645833333,
      "is_lower_bound": false,
      "measured_at": "2026-10-14T22:52:46.811000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-110862"
    }
  }
}