{"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": "2026-09-24T17:34:13.328Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "zitadel", "vendor": "zitadel", "versions": [{"status": "affected", "version": ">= 4.0.0, < 4.16.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-85056", "lastModified": "2026-09-24T18:19:04.180", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-24T18:19:04.040", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db"}, {"source": "security-advisories@github.com", "url": "https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43"}, {"source": "security-advisories@github.com", "url": "https://github.com/zitadel/zitadel/releases/tag/v4.16.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}