CVE-2026-29192 Overview
CVE-2026-29192 is a high-severity vulnerability affecting ZITADEL, an open source identity management platform. A security flaw in Zitadel's login V2 interface allows for possible account takeover through exploitation of the Default URI Redirect functionality. This vulnerability affects versions 4.0.0 through 4.11.1 and has been addressed in version 4.12.0.
Critical Impact
Successful exploitation could allow attackers to hijack user accounts by manipulating redirect URIs during the authentication flow, potentially compromising user credentials and session tokens.
Affected Products
- ZITADEL versions 4.0.0 through 4.11.1
- Login V2 interface component
- Organizations using ZITADEL for identity management
Discovery Timeline
- 2026-03-07 - CVE CVE-2026-29192 published to NVD
- 2026-03-10 - Last updated in NVD database
Technical Details for CVE-2026-29192
Vulnerability Analysis
This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), though the attack vector involves redirect manipulation in the authentication flow. The flaw exists within Zitadel's login V2 interface, specifically in how the application handles Default URI Redirect parameters.
The vulnerability requires network access and high-privileged access to exploit, though it can affect resources beyond the vulnerable component's security scope. When successfully exploited, attackers can achieve high impact on both confidentiality and integrity of user accounts, though availability is not directly affected.
Root Cause
The root cause stems from insufficient validation of redirect URIs within the login V2 authentication flow. The Default URI Redirect mechanism fails to properly sanitize or validate destination URLs, allowing attackers to redirect authenticated users to malicious endpoints during the login process.
Attack Vector
The attack exploits the network-accessible login V2 interface. An attacker with sufficient privileges can craft malicious authentication requests that manipulate the Default URI Redirect parameter. When a victim completes the authentication flow, they may be redirected to an attacker-controlled destination, potentially exposing authentication tokens, session cookies, or credentials.
The vulnerability mechanism involves crafting a malicious redirect URI that bypasses validation in the login V2 interface. When a user authenticates, the redirect mechanism can be exploited to send them to an attacker-controlled endpoint, enabling credential theft or session hijacking. For complete technical details, refer to the GitHub Security Advisory.
Detection Methods for CVE-2026-29192
Indicators of Compromise
- Unusual redirect URI patterns in authentication logs that point to external or unknown domains
- Authentication flows with suspicious or malformed redirect parameters
- User reports of unexpected redirects during login attempts
- Session tokens or credentials appearing in unexpected server logs
Detection Strategies
- Monitor authentication endpoint logs for anomalous redirect URI values
- Implement URL allowlisting for legitimate redirect destinations
- Review audit logs for authentication requests with external redirect URIs
- Deploy web application firewall rules to detect redirect manipulation attempts
Monitoring Recommendations
- Enable detailed logging on the ZITADEL login V2 interface
- Set up alerts for redirect URI parameters pointing to non-whitelisted domains
- Monitor for spikes in failed authentication attempts followed by unusual redirects
- Review ZITADEL audit logs regularly for suspicious authentication patterns
How to Mitigate CVE-2026-29192
Immediate Actions Required
- Upgrade ZITADEL to version 4.12.0 or later immediately
- Audit authentication logs for any signs of exploitation
- Review and restrict allowed redirect URIs in your ZITADEL configuration
- Notify users to report any suspicious login redirect behavior
Patch Information
ZITADEL has released version 4.12.0 which addresses this vulnerability. Organizations should upgrade their ZITADEL installations as soon as possible. The security advisory with complete patch details is available at the GitHub Security Advisory.
Workarounds
- Implement strict redirect URI validation at the network perimeter using a reverse proxy or WAF
- Configure allowlists for permitted redirect destinations in your authentication flows
- Temporarily disable or restrict access to the login V2 interface if upgrade is not immediately possible
- Monitor authentication endpoints closely until patching is complete
# Example: Verify ZITADEL version after upgrade
zitadel --version
# Expected output: 4.12.0 or higher
# Review redirect URI configuration
# Ensure only trusted domains are whitelisted in your ZITADEL configuration
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
