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'… (CVE-2026-105215)
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.
CVSS v3.1
Score 9.1critical
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-639g-x9rp-hw3x
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-105215"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6ac2c0972cdf04f656522e3c
Added to database: 10/04/2026, 21:09:43 UTC
Last updated: 10/04/2026, 21:09:43 UTC
Views: 1
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