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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)

CWE

CWE-287

Published

2026-10-04

Modified

2026-10-05

Record from

the NVD, synced 2026-10-19

References

• https://github.com/zitadel/zitadel/security/advisories/GHSA-45f2-5q3r-xgg6
• https://www.vulncheck.com/advisories/zitadel-before-3.4.14-and-4.16.2-account-takeover-via-passkey-enrollment

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