CVE-2026-23511
ZITADEL has a user enumeration vulnerability in Login UIs
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jan 15, 2026
- Updated
- Jan 15, 2026
- Reserved
- Jan 13, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-204 Observable Response Discrepancy
Affected Products
| Product | Versions |
|---|---|
zitadelzitadel |
|
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264r
- https://github.com/zitadel/zitadel/commit/b85ab69e4679b0268e2b0e9b4cd04e934af10dd2
- https://github.com/zitadel/zitadel/commit/c300d4cc6a2775ab17ddfe76492f24170f8b858d
- https://github.com/zitadel/zitadel/releases/tag/v3.4.6
- https://github.com/zitadel/zitadel/releases/tag/v4.9.1
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