Description


ZITADEL 3.0.0 before 4.18.0 contains a missing authentication vulnerability in the hosted Login V1 UI, where the change-username handler acts on the account bound to a login flow before any factor is verified. Unauthenticated attackers can submit a victim's login name and then post a new username to rename any active human user, including administrators, locking them out.

Related CPE's


Could not find any relations

Weaknesses



CWE-306

CVSS impact metrics


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

8.2 · High

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-12T17:17:34.547Z

1 hour ago

Last modified

2026-10-12T17:17:34.700Z

1 hour ago