---
id: CVE-2026-105206
title: >-
  ZITADEL 3.0.0 through 3.4.15 and 4.x before 4.17.3 contains an incorrect
  authorization flaw in the User Service API, which verifies user.read against
  the caller's organization rather than the organization owning the target user
summary: >-
  ZITADEL 3.0.0 through 3.4.15 and 4.x before 4.17.3 contains an incorrect
  authorization flaw in the User Service API, which verifies user.read against
  the caller's organization rather than the organization owning the target user.
  An authe…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-863
vendor: zitadel
product: zitadel
affected:
  - zitadel < 4.17.3
  - zitadel <= 4.19.4
published: '2026-10-04'
updated: '2026-10-04'
sourceUpdated: '2026-10-04T15:16:31.627'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105206'
references:
  - url: 'https://github.com/zitadel/zitadel/security/advisories/GHSA-j344-gqv4-84ff'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/zitadel-before-4.17.3-cross-organization-authentication-method-enumeration-via-user-service
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-04T15:00:34.388Z'
---

## Overview

ZITADEL 3.0.0 through 3.4.15 and 4.x before 4.17.3 contains an incorrect authorization flaw in the User Service API, which verifies user.read against the caller's organization rather than the organization owning the target user. An authenticated member holding org-scoped user.read can query GET /v2/users/{userId}/authentication_methods to learn which authentication method types users in other organizations have registered.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.