CVE-2026-105210

ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains a missing authentication flaw in the hosted Login V1 UI, whose second-factor enrollment and initialization handlers act on an identify-only session before any primary factor is verified. Attackers knowing only a victim's login name can enroll attacker-controlled TOTP, OTP-SMS, OTP-Email, or U2F factors, overwrite the verified phone number, and enumerate users through discrepant errors.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/zitadel/zitadel/security/advisories/GHSA-72q5-mv5c-vxv4
https://www.vulncheck.com/advisories/zitadel-before-4.17.1-unauthenticated-mfa-enrollment-via-login-v1-init-handlers

Configurations

No configuration.

History

04 Oct 2026, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-04 15:16

Updated : 2026-10-29 21:17

NVD link : CVE-2026-105210

Mitre link : CVE-2026-105210

CVE.ORG link : CVE-2026-105210

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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