CVE-2026-105215
ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login…
- Risk score
- 65/100
- CVSS
- 9.1 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 4 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 ExternalUs…
- Affected
- See advisory
- Fix
- Upgrade the product to 3.4.14 or 4.16.2 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.1 critical
- Remotely exploitable without logging in
References
Original 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.
Last activity 4 Oct 2026. Patch Forecast updates every hour.