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.
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Affected Vendors & Products
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History
Mon, 28 Sep 2026 15:30:00 +0000
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Thu, 24 Sep 2026 19:30:00 +0000
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| Description | 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. | |
| Title | ZITADEL: MFA bypass via session reuse in Login V2 | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-24T17:34:13.328Z
Updated: 2026-09-28T14:56:04.082Z
Reserved: 2026-09-02T21:21:01.774Z
Link: CVE-2026-85056
Updated: 2026-09-28T14:55:56.048Z
Status : Deferred
Published: 2026-09-24T18:19:04.040
Modified: 2026-09-28T15:17:24.163
Link: CVE-2026-85056
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