ZITADEL: Login V2 UI Policy Bypass Allows Unauthorized Self-Registration and Authentication

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.2 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS

• CVE-2026-29193: 0.35% estimated exploitation activity in the next 30 days; percentile 28.89 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A vulnerability in Zitadel's login V2 UI allowed users to bypass login behavior and security policies and self-register new accounts or sign in using password even if corresponding options were disabled in their organizaton. Impact Zitadel enables administrators to configure their organization’s login behavior and security policies. As part of this functionality, they can disable user self-registration, enforce passwordless logins only, and more. Due to improper enforcement an attacker could send direct HTTP requests to the login UI and create accounts in organizations that have disabled user self-registration, and gain unauthorized access to the system. The same attack vector could be used to authenticate for example using username and password even when this login method was disabled. Affected Versions Systems running one of the following versions are affected: - 4.x: 4.0.0 through 4.12.0 (including RC versions) Patches The vulnerability has been addressed in the latest…

Published by the source

4 Mar 2026, 22:51 UTC

Last modified by the source

9 Mar 2026, 15:46 UTC

Source last checked

26 Oct 2026, 15:15 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-25rw-g6ff-fmg8

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# Patch Next advisory brief: CVE-2026-29193

Advisory: ZITADEL: Login V2 UI Policy Bypass Allows Unauthorized Self-Registration and Authentication
IDs: CVE-2026-29193, GHSA-25rw-g6ff-fmg8
Record: https://patchnext.com/advisories/cve-2026-29193 (revision 1, source checked 26 Oct 2026, 15:15 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/zitadel/zitadel 4.12.1; github.com/zitadel/zitadel/v2 4.12.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/zitadel/zitadel: affected >= 4.0.0, <= 4.12.0; fixed in 4.12.1
- Go github.com/zitadel/zitadel/v2: affected >= 4.0.0, <= 4.12.0; fixed in 4.12.1

## Suggested inspection (read-only)
- Go github.com/zitadel/zitadel: check the installed version with your package manager.
- Go github.com/zitadel/zitadel/v2: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/zitadel/zitadel, github.com/zitadel/zitadel/v2.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-25rw-g6ff-fmg8 (GitHub-reviewed advisory GHSA-25rw-g6ff-fmg8 lists affected ranges: Go github.com/zitadel/zitadel/v2 >=4.0.0 =4.0.0 <=4.12.0)

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