CVE-2026-23511mediumCWE-204

ZITADEL has a user enumeration vulnerability in Login UIs

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.3epss 0.4%

exploitation probability

0.4%top 71% of all CVEs

observed exploitation

nono source reports it

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.

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

Affected products

zitadel · zitadel

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