CVE-2026-105215Published

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

Exact source revision recorded 29 Oct 2026 21:48:56 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-105215

Published

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 published: 4 Oct 2026 13:10:07 UTC
Source modified: 29 Oct 2026 20:19:21 UTC
Observed here: 29 Oct 2026 21:48:56 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1 · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N