What is CVE-2026-105212?

CVE-2026-105212 is a high-severity vulnerability in Zitadel, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-10-04.

How severe is CVE-2026-105212?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Zitadel

CVE-2026-105212

ZITADEL 3.x before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 and Login V2 UIs that accepts passkey or other authenticator enrollment on identify-only login sessions, before any primary factor is verified. Unauthenticated attackers knowing only a victim's login name can register an attacker-controlled authenticator and log in as that user, bypassing existing passwords and MFA.

Vulnerability class: Broken Authentication

Published 2026-10-04 · last modified 2026-10-04.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Zitadel

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/zitadel/zitadel/security/advisories/GHSA-45f2-5q3r-xgg6 (vendor-advisory)
www.vulncheck.com/advisories/zitadel-before-3.4.14-and-4.16.2-account-takeover-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-105212?: CVE-2026-105212 is a high-severity vulnerability in Zitadel, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-10-04.
How severe is CVE-2026-105212?: High severity. CVSS v3 base score is 7.5 out of 10.