ETK-2026-364Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-364",
  "cve_id": null,
  "display_id": "ETK-2026-364",
  "ghsa_id": null,
  "euvd_id": null,
  "status": "retired",
  "anchor_state": "awaiting_cve",
  "title": "OAuth proxy authentication bypass in better-auth",
  "summary": "better-auth versions 1.5.0-beta.12 through 1.7.6 are affected when the OAuth Proxy plugin uses cookie-backed sign-in state and lacks a distinct proxy secret for each participating environment. An unauthenticated attacker who knows a user's verified email address may gain access as that user if implicit account linking is enabled.",
  "mitigation": "Upgrade better-auth to 1.7.7 and update all packages and nodes participating in the same OAuth or SAML state flow together. Until upgraded, use a dedicated OAuth Proxy secret that differs from each environment's global secret, move state storage to the database, or disable the OAuth Proxy plugin.",
  "vendor": "npm",
  "product": "npm:better-auth",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.5.0-beta.12, < 1.7.7"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.7.7"
      ],
      "package_name": "better-auth",
      "purl": "pkg:npm/better-auth"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 7.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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": null,
  "t0_at": null,
  "signals": {}
}