CVE-2026-29192: ZITADEL: Stored XSS via Default URI Redirect Leads to Account Takeover
Summary
A vulnerability in Zitadel's login V2 interface was discovered, allowing for possible account takeover.
Impact
Zitadel allows organization administrators to change the default redirect URI for their organization. This setting enables them to redirect users to an arbitrary location after they log in.
Due to missing restrictions and improper handling, malicious javascrtipt code could be executed in Zitadel login UI (v2) using the users’ browser.
An unauthenticated remote attacker can exploit this Stored XSS vulnerability, reset the password of their victims, and take over their accounts.
It's important to note that this specific attack vector is mitigated for accounts that have Multi-Factor Authentication (MFA) or Passwordless authentication enabled.Stored XSS vulnerability.
Affected Versions
Systems running one of the following versions are affected: - 4.x: 4.0.0 through 4.11.1 (including RC versions)
Patches
The vulnerability has been addressed in the latest releases. The login UI prevents execution of such code. Additionally, the page to change the password, now always requires the user's current password regardless of the state of the authenticated session.
4.x: Upgrade to >= 4.12.0
Workarounds
The recommended solution is to upgrade to a patched version.
Questions
If there are any questions or comments about this advisory, please send an email to security@zitadel.com
Credits
ZITADEL extends thanks once again to Amit Laish from GE Vernova for finding and reporting the vulnerability.
Other sources
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 Default URI Redirect. This issue has been patched in version 4.12.0.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-29192?
CVE-2026-29192 is considered a critical vulnerability due to the potential for account takeover.
How do I fix CVE-2026-29192?
To mitigate CVE-2026-29192, upgrade Zitadel to version 4.12.0 or later.
What software is affected by CVE-2026-29192?
CVE-2026-29192 affects Zitadel versions from 4.0.0 up to 4.12.0.
What type of vulnerability is CVE-2026-29192?
CVE-2026-29192 is a stored cross-site scripting (XSS) vulnerability.
What impact does CVE-2026-29192 have on organizations?
CVE-2026-29192 can lead to unauthorized access and account takeover for affected users.