CVE-2026-110863

{
  "etk_id": "ETK-2026-1614",
  "cve_id": "CVE-2026-110863",
  "display_id": "CVE-2026-110863",
  "ghsa_id": "GHSA-47gc-4jpf-3mgv",
  "euvd_id": "EUVD-2026-101746",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authentication bypass in better-auth sso",
  "summary": "The better-auth sso package is affected from 1.7.0-rc.2 through versions before 1.7.3. An authenticated user who can add a personal SSO provider may impersonate another user and obtain a session for that account.",
  "mitigation": "Upgrade the sso package to version 1.7.3 or later. Until upgraded, restrict or disable personal SSO provider registration for untrusted users.",
  "vendor": "better-auth",
  "product": "sso",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.7.0-rc.2, < 1.7.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.7.3"
      ],
      "package_name": "@better-auth/sso",
      "purl": "pkg:npm/@better-auth/sso"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.7.0, < 1.7.3"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.7.3"
      ],
      "package_name": "@better-auth/sso",
      "purl": "pkg:npm/@better-auth/sso"
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": 0.0027,
  "epss_percentile": 0.18,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 35.0016977,
  "t0_at": "2026-10-14T22:52:50.378000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-14T22:52:50.378000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-14T22:52:50.378000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-110863"
    }
  }
}