Information Exposure Affecting github.com/zitadel/zitadel/internal/api/ui/login package, versions >=2.0.0 <3.4.6>=4.0.0-rc.1 <4.9.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMZITADELZITADELINTERNALAPIUILOGIN-15032891
- published18 Jan 2026
- disclosed15 Jan 2026
- creditMarco A, Livio Spring
Introduced: 15 Jan 2026
CVE-2026-23511 Â (opens in a new tab)How to fix?
Upgrade github.com/zitadel/zitadel/internal/api/ui/login to version 3.4.6, 4.9.1 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure via the login UI process. An attacker can determine the existence of valid user accounts by submitting arbitrary userIDs and observing the system's response. This can be achieved by iterating through potential userIDs and analyzing the feedback provided by the password reset functionality.
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Workaround**
This vulnerability can be mitigated by implementing rate limiting or similar measures to restrict enumeration attempts.