CVE-2026-105210

{
  "etk_id": "ETK-2026-572",
  "cve_id": "CVE-2026-105210",
  "display_id": "CVE-2026-105210",
  "ghsa_id": "GHSA-j55w-p4wc-frwh",
  "euvd_id": "EUVD-2026-92103",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Missing authentication in ZITADEL Login V1 factor enrollment",
  "summary": "ZITADEL hosted Login V1 UI is affected in 3.x releases before 3.4.15 and 4.x releases before 4.17.1. An attacker who knows a user's login name may register attacker-controlled second factors, change a verified phone number, or infer whether users exist without first completing primary authentication.",
  "mitigation": "Upgrade ZITADEL 3.x to 3.4.15 or later, or ZITADEL 4.x to 4.17.1 or later. Until upgraded, restrict exposure to the hosted Login V1 UI and monitor second-factor enrollment and phone-number changes.",
  "vendor": "zitadel",
  "product": "zitadel",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 4.17.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.17.1"
      ],
      "package_name": "zitadel",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 3.4.15"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "3.4.15"
      ],
      "package_name": "zitadel",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 8.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
  "epss_score": 0.0024,
  "epss_percentile": 0.1369,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 16.239699616666666,
  "t0_at": "2026-10-04T13:10:03.949000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-04T13:10:03.949000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-04T13:10:03.949000+00:00",
      "url": "https://github.com/advisories/GHSA-j55w-p4wc-frwh"
    }
  }
}