CRITICAL 9.3 NVD
CVE-2026-105215
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 en
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.
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-738m-7888-jfv8
- https://www.vulncheck.com/advisories/zitadel-before-4.16.2-account-pre-hijacking-via-forge
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-10-04 via NVD.
Risk Timeline
CVE Disclosed2026-10-04 · -1 days ago
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