CVE-2026-105215 — ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback
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 cli…
Published: 2026-10-04 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7