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CVE-2026-105213— ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations

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.

ZITADEL 4.x 版本在 4.17.1 之前，在执行 Login V2 身份验证时，未检查组织（organization）的非活跃状态，而仅验证了单个用户的状态。因此，即使组织已被停用，只要用户持有有效的凭据、已存在的会话或刷新令牌，仍然可以登录、创建会话，以及获取或刷新令牌。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
zitadel zitadel < 4.17.1 affected
4.17.1 unaffected
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I. Basic Information for CVE-2026-105213

Vulnerability Information
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Vulnerability Title
ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations
Source: CVE Program / CVE List V5
Vulnerability Description
ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, verifying only the individual user's status. Users of a deactivated organization who hold valid credentials, an existing session, or a refresh token can still sign in, create sessions, and obtain or refresh tokens.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zitadel zitadel 0 ~ 4.17.1 -

II. Public POCs for CVE-2026-105213

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III. Intelligence Information for CVE-2026-105213

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Other References for CVE-2026-105213 (2)

Same Patch Batch · zitadel · 2026-10-04 · 10 CVEs total

CVE-2026-105207 9.8 CRITICAL ZITADEL before 4.17.3 Account Takeover via External IdP Linking
CVE-2026-105209 9.6 CRITICAL ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey Enrollmen
CVE-2026-105215 9.1 CRITICAL ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback
CVE-2026-105210 8.2 HIGH ZITADEL before 4.17.1 Unauthenticated MFA Enrollment via Login V1 Init Handlers
CVE-2026-105211 8.1 HIGH ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCode
CVE-2026-105208 7.7 HIGH ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokens
CVE-2026-105212 7.5 HIGH ZITADEL before 3.4.14 and 4.16.2 Account Takeover via Passkey Enrollment
CVE-2026-105206 5.3 MEDIUM ZITADEL before 4.17.3 Cross-Organization Authentication Method Enumeration via User Servic
CVE-2026-105214 2.3 LOW Zitadel before 4.16.2 SSRF via Organization Domain HTTP Verification

IV. Related Vulnerabilities

Same product: zitadel
Same vendor: zitadel
Same weakness: CWE-287

V. Comments for CVE-2026-105213

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