CVE-2026-29193: ZITADEL Login V2 UI Policy Bypass Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-25rw-g6ff-fmg8",
  "modified" : "2026-03-09T15:46:19Z",
  "published" : "2026-03-04T22:51:16Z",
  "aliases" : [ "CVE-2026-29193" ],
  "summary" : "ZITADEL: Login V2 UI Policy Bypass Allows Unauthorized Self-Registration and Authentication",
  "details" : "### Summary\n\nA 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.\n\n### Impact\n\nZitadel 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.\n\nDue 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.\nThe same attack vector could be used to authenticate for example using username and password even when this login method was disabled.\n\n### Affected Versions\n\nSystems running one of the following versions are affected:\n- **4.x**: `4.0.0` through `4.12.0` (including RC versions)\n\n### Patches\n\nThe vulnerability has been addressed in the latest releases. The patch resolves the issue by enforcing the policies on the logiin UI server.\n\n4.x: Upgrade to >=[4.12.1](https://github.com/zitadel/zitadel/releases/tag/v4.12.1)\n\n### Workarounds\n\nThe recommended solution is to upgrade to a patched version.\n\n### Questions\n\nIf there are any questions or comments about this advisory, please send an email to [security@zitadel.com](mailto:security@zitadel.com)\n\n### Credits \n\nZITADEL extends thanks once again to Amit Laish from GE Vernova for finding and reporting the vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/zitadel/zitadel/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.12.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.12.0"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/zitadel/zitadel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.12.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.12.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/zitadel/zitadel/security/advisories/GHSA-25rw-g6ff-fmg8"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-29193"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/zitadel/zitadel"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zitadel/zitadel/releases/tag/v4.12.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-04T22:51:16Z",
    "nvd_published_at" : "2026-03-07T15:15:55Z"
  }
}