Vulnerability-Lookup

CVE-2026-29067 (GCVE-0-2026-29067)

Vulnerability from cvelistv5 – Published: 2026-03-07 15:12 – Updated: 2026-03-09 18:27

Title

ZITADEL: Account Takeover Due to Improper Instance Validation in V2 Login

Summary

ZITADEL is an open source identity management platform. From version 4.0.0-rc.1 to 4.7.0, a potential vulnerability exists in ZITADEL's password reset mechanism in login V2. ZITADEL utilizes the Forwarded or X-Forwarded-Host header from incoming requests to construct the URL for the password reset confirmation link. This link, containing a secret code, is then emailed to the user. This issue has been patched in version 4.7.1.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-09 17:39 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7634 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/zitadel/zitadel/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
zitadel	zitadel	Affected: >= 4.0.0-rc.1, < 4.7.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-29067

Vulnerability from fkie_nvd - Published: 2026-03-07 15:15 - Updated: 2026-06-17 10:29

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
9.3 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/zitadel/zitadel/security/advisories/GHSA-pfrf-9r5f-73f5	Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	zitadel	zitadel	*

JSON

To clipboard

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      "affectedData": [
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          "product": "zitadel",
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          "versions": [
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    },
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GHSA-PFRF-9R5F-73F5

Vulnerability from github – Published: 2025-12-08 22:19 – Updated: 2026-03-09 15:47

Summary

ZITADEL Vulnerable to Account Takeover Due to Improper Instance Validation in V2 Login

Details

Summary

A potential vulnerability exists in ZITADEL's password reset mechanism in login V2. ZITADEL utilizes the Forwarded or X-Forwarded-Host header from incoming requests to construct the URL for the password reset confirmation link. This link, containing a secret code, is then emailed to the user.

Impact

If an attacker can manipulate these headers (e.g., via host header injection), they could cause ZITADEL to generate a password reset link pointing to a malicious domain controlled by the attacker. If the user clicks this manipulated link in the email, the secret reset code embedded in the URL can be captured by the attacker. This captured code could then be used to reset the user's password and gain unauthorized access to their account.

It's important to note that this specific attack vector is mitigated for accounts that have Multi-Factor Authentication (MFA) or Passwordless authentication enabled.

Affected Versions

Systems using the login UI (v2) and running one of the following versions are affected: - v4.x: 4.0.0-rc.1 through 4.7.0

Patches

The vulnerability has been addressed in the latest release. The patch resolves the issue by correctly validating the X-Forwarded-Host and Forwarded headers against the instance custom and trusted domains.

Before you upgrade, ensure that: - the ZITADEL_API_URL is set and is pointing to your instance, resp. system in multi-instance deployments. - the HTTP host (or a x-forwarded-host) is passed in your reverse proxy to the login UI. - a x-zitadel-instance-host (or x-zitadel-forward-host) is set in your reverse for multi-instance deployments. If you're running a single instance solution, you don't need to take any actions.

Patched versions: - 4.x: Upgrade to >=4.7.1

Workarounds

The recommended solution is to update ZITADEL to a patched version.

A ZITADEL fronting proxy can be configured to delete all forwarded header values or set it to the requested host before sending requests to ZITADEL self-hosted environments.

Questions

If you have any questions or comments about this advisory, please email us at security@zitadel.com

Credits

Thanks to Amit Laish – GE Vernova for finding and reporting the vulnerability.

Severity

8.1 (High)


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

Show details on source website

JSON

To clipboard

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        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
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            }
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          "type": "ECOSYSTEM"
        }
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    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.83.4"
            },
            {
              "last_affected": "1.87.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-rc.1"
            },
            {
              "fixed": "4.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.80.0-v2.20.0.20251208091519-4c879b47334e"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-29067"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-08T22:19:38Z",
    "nvd_published_at": "2026-03-07T15:15:54Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nA potential vulnerability exists in ZITADEL\u0027s password reset mechanism in login V2. ZITADEL utilizes the Forwarded or X-Forwarded-Host header from incoming requests to construct the URL for the password reset confirmation link. This link, containing a secret code, is then emailed to the user.\n\n### Impact\n\nIf an attacker can manipulate these headers (e.g., via host header injection), they could cause ZITADEL to generate a password reset link pointing to a malicious domain controlled by the attacker. If the user clicks this manipulated link in the email, the secret reset code embedded in the URL can be captured by the attacker. This captured code could then be used to reset the user\u0027s password and gain unauthorized access to their account.\n\nIt\u0027s important to note that this specific attack vector is mitigated for accounts that have Multi-Factor Authentication (MFA) or Passwordless authentication enabled.\n\n### Affected Versions\n\nSystems using the login UI (v2) and running one of the following versions are affected:\n- **v4.x**: `4.0.0-rc.1` through `4.7.0`\n\n### Patches\n\nThe vulnerability has been addressed in the latest release. The patch resolves the issue by correctly validating the X-Forwarded-Host and Forwarded headers against the instance custom and trusted domains.\n\nBefore you upgrade, ensure that:\n- the `ZITADEL_API_URL` is set and is pointing to your instance, resp. system in multi-instance deployments.\n- the HTTP `host` (or a `x-forwarded-host`) is passed in your reverse proxy to the login UI.\n- a `x-zitadel-instance-host` (or `x-zitadel-forward-host`) is set in your reverse for multi-instance deployments. If you\u0027re running a single instance solution, you don\u0027t need to take any actions.\n\nPatched versions:\n- 4.x: Upgrade to \u003e=[4.7.1](https://github.com/zitadel/zitadel/releases/tag/v4.7.1)\n\n### Workarounds\n\nThe recommended solution is to update ZITADEL to a patched version.\n\nA ZITADEL fronting proxy can be configured to delete all forwarded header values or set it to the requested host before sending requests to ZITADEL self-hosted environments.\n\n### Questions\n\nIf you have any questions or comments about this advisory, please email us at [security@zitadel.com](mailto:security@zitadel.com)\n\n### Credits\n\nThanks to Amit Laish \u2013 GE Vernova for finding and reporting the vulnerability.",
  "id": "GHSA-pfrf-9r5f-73f5",
  "modified": "2026-03-09T15:47:05Z",
  "published": "2025-12-08T22:19:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-pfrf-9r5f-73f5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29067"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/4c879b47334e01d4fcab921ac1b44eda39acdb96"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zitadel/zitadel"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ZITADEL Vulnerable to Account Takeover Due to Improper Instance Validation in V2 Login"
}

Sightings

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CVE-2026-29067 (GCVE-0-2026-29067)

FKIE_CVE-2026-29067

GHSA-PFRF-9R5F-73F5

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