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NVD CRITICAL: CVE-2026-105215 — ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in...

·Source: NIST NVD

Updated:

Executive Summary

ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI because the 'external account not found' registration endpoint trusts client-supplied external identity fields without a completed IdP callback. Unauthenticated attackers can submit forged IDPConfigID and ExternalUserID values to pre-create an account bound to a victim's external IdP identity, w

Analysis

ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI because the 'external account not found' registration endpoint trusts client-supplied external identity fields without a completed IdP callback. Unauthenticated attackers can submit forged IDPConfigID and ExternalUserID values to pre-create an account bound to a victim's external IdP identity, which the victim's later genuine external login then signs into. CVSS Score: 9.1. Published: 2026-10-04T15:16:32.993.

Indicators of Compromise (1)

CVE (1)
CVE-2026-105215
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Oct 4, 2026. Verified by: NIST.

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