High severity · published Jul 10, 2026
CVE-2026-56667
ZITADEL: Stored XSS via Default URI Redirect in Login V2
7.3
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZI
zitadel · zitadel
< 4.15.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56667
github.com
https://github.com/zitadel/zitadel/commit/038265925a3b05ac1df8aad461ab071983e9eb85
github.com
https://github.com/zitadel/zitadel/releases/tag/v4.15.3
github.com
https://github.com/zitadel/zitadel/security/advisories/GHSA-5wcj-9wj4-j65h
More from zitadel
9.8
CVE-2026-105207
ZITADEL before 4.17.3 Account Takeover via External IdP Linking
9.8
CVE-2025-64717
ZITADEL vulnerable to Account Takeover with deactivated Instance IdP
9.8
CVE-2025-64103
Zitadel Bypass Second Authentication Factor
9.8
CVE-2025-64102
Zitadel allows brute-forcing authentication factors
9.6
CVE-2026-105209
ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey Enrollment