{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "fixed": "4.16.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c86c60bab86b64b44755d2776703939c01686055"
            },
            {
              "fixed": "049dbb25a56587fb3980c85c99819cad69f637db"
            },
            {
              "fixed": "56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43"
            },
            {
              "fixed": "cc3812a940d629984802fd1246f84fd91d07f6e8"
            }
          ],
          "repo": "https://github.com/zitadel/zitadel",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9993-rfwp-rhwf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85056.json"
  },
  "details": "ZITADEL is an open source identity management platform. From 4.0.0 until 4.16.1, ZITADEL Login V2 creates a browser session after password verification and can reuse that session for a later authentication request without verifying a user's enrolled TOTP, OTP, or U2F second factor. When the MFA step is abandoned and login starts again, session-validity checks require MFA only when the organization enables Force MFA or Force MFA for local users only, so a voluntarily enrolled factor can be skipped while completing an OIDC or SAML callback for a customer application. Login V1, the ZITADEL Console, Management and Admin APIs, and user self-management are not affected. This issue is fixed in version 4.16.1.",
  "id": "CVE-2026-85056",
  "modified": "2026-09-26T03:30:21.376916770Z",
  "published": "2026-09-24T17:34:13.328Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/releases/tag/v4.16.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85056.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85056"
    },
    {
      "type": "FIX",
      "url": "https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db"
    },
    {
      "type": "FIX",
      "url": "https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ZITADEL: MFA bypass via session reuse in Login V2"
}