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    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.

    Published:Oct 4, 2026
    Last Modified:Oct 5, 2026
    EPS:Oct 4, 2026
    EPSS Score:0.00236
    CVSS Score:8.2

    Affected Products

    Vendor
    Zitadel
    Product
    Zitadel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2026-119129 (CVSS 8.6) — ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.19.5 contains a missing authorization vulnerability in Login V…
    CVE-2026-119128 (CVSS 9.1) — ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows una…
    CVE-2026-119127 (CVSS 8.6) — ZITADEL 4.0.0 before 4.19.5 contains a host header injection vulnerability in the Login V2 UI that allows unau…
    CVE-2026-109374 (CVSS 5.1) — ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows e…
    CVE-2026-109373 (CVSS 9.2) — ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows una…
    CVE-2026-109372 (CVSS 9.3) — ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 contains an authentication bypass in the SAML identity-provid…
    CVE-2026-109371 (CVSS 8.8) — ZITADEL 3.0.0 before 4.18.0 contains a missing authentication vulnerability in the hosted Login V1 UI, where t…
    CVE-2026-105215 (CVSS 9.3) — ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI becaus…
    CVE-2026-105214 (CVSS 2.3) — Zitadel before 4.16.2 contains a server-side request forgery vulnerability that allows attackers to make the s…
    CVE-2026-105213 (CVSS 8.8) — ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, veri…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High