CVE-2026-105210
8.8
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| zitadel | zitadel | 0 < 4.17.1 | affected |
| zitadel | zitadel | 4.17.1 | unaffected |
| zitadel | zitadel | 0 < 3.4.15 | affected |
| zitadel | zitadel | 3.4.15 | unaffected |
Weaknesses
- CWE-287: Improper Authentication
References
- 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
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