XSS in Zitadel
CVE-2026-56667
ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL Login V2 OIDC and SAML FailedPrecondition error paths return loginSettings.defaultRedirectUri to router.push without applying the isSafeRedirectUri check, allowing an organization or instance administrator to store a javascript or data URI that can execute in a user's browser when an affected login error path is reached. This issue is fixed in version 4.15.3.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (30.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Zitadel — versions < 4.15.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-56667?
- CVE-2026-56667 is a high-severity vulnerability in Zitadel, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-07-10.
- How severe is CVE-2026-56667?
- High severity. CVSS v3 base score is 7.3 out of 10.