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CVE-2026-109374— ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

Quick assessment

Affected
zitadel zitadel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 ZITADEL 3.0.0 至 4.19.2（不含 4.19.2）版本中，OIDC 令牌交换功能存在一个特权提升漏洞。攻击者可以利用该漏洞绕过 检查，从而冒充包括 在内的管理员身份。拥有 或 角色的攻击者，可以以管理员身份及其相应角色和声明（claims）登录到依赖方（relying）应用程序。

CVSS 5.5 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1199 · Trusted Relationship

Affected Version Matrix 2

VendorProduct Version RangeStatus
zitadel zitadel 3.0.0< 4.19.2 affected
4.19.2 unaffected
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I. Basic Information for CVE-2026-109374

Vulnerability Information
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Vulnerability Title
ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zitadel zitadel 3.0.0 ~ 4.19.2 -

II. Public POCs for CVE-2026-109374

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III. Intelligence Information for CVE-2026-109374

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Vendor Advisories for CVE-2026-109374 (2)

Same Patch Batch · zitadel · 2026-10-12 · 4 CVEs total

CVE-2026-109372 8.7 HIGH ZITADEL 3.0.0 before 4.19.2 Account Takeover via SAML Identity-Provider Confusion
CVE-2026-109371 8.2 HIGH ZITADEL 3.0.0 before 4.18.0 Unauthenticated Username Change via Login V1
CVE-2026-109373 8.1 HIGH ZITADEL 3.0.0 before 4.19.2 Account Takeover via Unsigned Login V2 Session Cookie

IV. Related Vulnerabilities

Same product: zitadel
Same vendor: zitadel
Same weakness: CWE-863

V. Comments for CVE-2026-109374

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