CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NCVE-2026-23511
Medium (5.3) in zitadel zitadel. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/zitadel/zitadel 3.4.6, 4.9.1.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-31)
- CWE
- CWE-204
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zitadel:zitadel
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pvm5-9frx-264r | Go | github.com/zitadel/zitadel | >=4.0.0 <4.9.1 | 4.9.1 |
| GHSA-pvm5-9frx-264r | Go | github.com/zitadel/zitadel | <3.4.6 | 3.4.6 |
| GO-2026-4319 | Go | github.com/zitadel/zitadel | all versions | no fix published |
References
- 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
- https://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264r