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.
References (5)
Core 5
Core References
Third Party Advisory x_refsource_confirm
https://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264r
Patch x_refsource_misc
https://github.com/zitadel/zitadel/commit/b85ab69e4679b0268e2b0e9b4cd04e934af10dd2
Patch x_refsource_misc
https://github.com/zitadel/zitadel/commit/c300d4cc6a2775ab17ddfe76492f24170f8b858d
Release Notes x_refsource_misc
https://github.com/zitadel/zitadel/releases/tag/v3.4.6
Release Notes x_refsource_misc
https://github.com/zitadel/zitadel/releases/tag/v4.9.1
Scores
CVSS v3
5.3
EPSS
0.0036
EPSS Percentile
27.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-204
Status
published
Products (2)
zitadel/zitadel
2.0.0 - 2.71.19
zitadel/zitadel
4.0.0 - 4.9.1Go
Published
Jan 15, 2026
Tracked Since
Feb 18, 2026