CVE-2026-29191 Details
Description
ZITADEL is an open source identity management platform. From version 4.0.0 to 4.11.1, a vulnerability in Zitadel's login V2 interface was discovered that allowed a possible account takeover via XSS in /saml-post Endpoint. This issue has been patched in version 4.12.0.
A cross-site scripting (XSS) vulnerability has been identified in ZITADEL's login V2 interface, affecting versions 4.0.0 prior to 4.11.1. The issue allows for potential account takeover through the /saml-post endpoint, which handles requests to SAML Identity Providers (IdPs). The endpoint reflects user-supplied input without proper HTML encoding, enabling the injection of arbitrary HTML that could be exploited to execute malicious JavaScript in the browsers of ZITADEL users. This vulnerability can be exploited by an unauthenticated remote attacker to execute JavaScript on behalf of the user, potentially leading to password resets and account takeovers. However, accounts with Multi-Factor Authentication (MFA) or Passwordless authentication enabled are not vulnerable.
Users are advised to upgrade to ZITADEL version 4.12.0 or later. If an upgrade is not possible and no SAML IdP integration is needed, a Web Application Firewall (WAF) or reverse proxy rule can be deployed to prevent access to the /saml-post endpoint.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/zitadel/zitadel/security/advisories/GHSA-pr34-2v5x-6qjq | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| zitadel zitadel | >= 4.0.0, < 4.12.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 10, 2026 | Initial Analysis | [email protected] |
| Mar 7, 2026 | New CVE Received | [email protected] |