---
id: CVE-2026-109374
title: >-
  ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in
  OIDC token exchange that allows end-user impersonators to impersonate
  administrators including IAM_OWNER by bypassing the admin.impersonation check
summary: >-
  ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in
  OIDC token exchange that allows end-user impersonators to impersonate
  administrators including IAM_OWNER by bypassing the admin.impersonation check.
  Attackers h…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-863
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:35.393'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109374'
references:
  - url: 'https://github.com/zitadel/zitadel/security/advisories/GHSA-w4gv-rcwj-w6r5'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-privilege-escalation-via-oidc-token-exchange-impersonation
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.217Z'
---

## Overview

ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows end-user impersonators to impersonate administrators including IAM_OWNER by bypassing the admin.impersonation check. Attackers holding IAM_END_USER_IMPERSONATOR or ORG_END_USER_IMPERSONATOR roles can sign in to relying applications as administrators with their roles and claims.

## Remediation

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