CVE-2026-105211

HighCVSS 8.1/10Last modified Oct 5, 2026

Description

ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows unauthenticated attackers to take over accounts by obtaining OTP codes via the returnCode delivery type. Attackers knowing a login name of a victim with OTP-Email and OTP-SMS enrolled can read both codes from server-action responses to gain MFA-authenticated sessions, including administrator takeover.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-200

Affected software

No affected versions have been published.

Timeline

Published: Oct 4, 2026
Last modified: Oct 5, 2026
NVD status: Deferred

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