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OFFICIAL CVE RECORD9.3 Critical

CVE-2026-105215

ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

zitadel zitadel

Default version status: unaffected

  • 4.0.0 to < 4.16.2affected
  • 4.16.2unaffected

zitadel zitadel

Default version status: unaffected

  • 0 to < 3.4.14affected
  • 3.4.14unaffected

References