CVE-2026-23511 — ZITADEL has a user enumeration vulnerability in Login UIs
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 unauthen…
Published: 2026-01-15 · CVSS: 5.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7