CVE-2026-23511 MEDIUM

CVE-2026-23511: ZITADEL has a user enumeration vulnerability in Login UIs

Vendor Zitadel
Product zitadel
Weakness CWE-204
Published January 15, 2026
Last update January 15, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. This vulnerability is fixed in 4.9.1 and 3.4.6.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
January 15, 2026 Record updated