CVE-2026-109372

{
  "etk_id": "ETK-2026-1386",
  "cve_id": "CVE-2026-109372",
  "display_id": "CVE-2026-109372",
  "ghsa_id": "GHSA-65fv-6pff-4q47",
  "euvd_id": "EUVD-2026-97670",
  "status": "published",
  "anchor_state": "anchored",
  "title": "SAML callback authentication bypass in ZITADEL",
  "summary": "ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 are affected by an authentication bypass in the SAML identity-provider intent callback. An attacker with organization-administrator permission can obtain authenticated sessions as users linked to a different SAML provider, potentially across organizations on the same instance.",
  "mitigation": "Upgrade ZITADEL to version 4.19.2 or later. Until upgrading, restrict organization-administrator access and review SAML identity-provider configuration changes.",
  "vendor": "zitadel",
  "product": "zitadel",
  "affected": [
    {
      "affected_notes": [
        "4.0.0 - 4.19.1"
      ],
      "affected_ranges": [],
      "ecosystem": "zitadel",
      "fixed_versions": [
        "4.19.2"
      ],
      "package_name": "ZITADEL",
      "purl": null
    },
    {
      "affected_notes": [
        "3.0.0 - 3.4.15"
      ],
      "affected_ranges": [],
      "ecosystem": "zitadel",
      "fixed_versions": [],
      "package_name": "ZITADEL",
      "purl": null
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
  "epss_score": 0.0037,
  "epss_percentile": 0.2947,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 25.310489666666665,
  "t0_at": "2026-10-12T16:05:44.977000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-12T16:05:44.977000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-12T16:05:44.977000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-109372"
    }
  }
}