{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-85056",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-02T21:21:01.774Z",
        "datePublished": "2026-09-24T17:34:13.328Z",
        "dateUpdated": "2026-09-28T14:56:04.082Z"
    },
    "containers": {
        "cna": {
            "title": "ZITADEL: MFA bypass via session reuse in Login V2",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf"
                },
                {
                    "name": "https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db"
                },
                {
                    "name": "https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43"
                },
                {
                    "name": "https://github.com/zitadel/zitadel/releases/tag/v4.16.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zitadel/zitadel/releases/tag/v4.16.1"
                }
            ],
            "affected": [
                {
                    "vendor": "zitadel",
                    "product": "zitadel",
                    "versions": [
                        {
                            "version": ">= 4.0.0, < 4.16.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-24T17:34:13.328Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-9993-rfwp-rhwf",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-28T14:55:51.988985Z",
                                "id": "CVE-2026-85056",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-28T14:56:04.082Z"
                }
            }
        ]
    }
}