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CVE-2026-94218— Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication session restart endpoint

Quick assessment

Affected
Red Hat Red Hat Build of Keycloak
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 Keycloak（一种身份和访问管理解决方案）的身份验证会话管理中发现了漏洞。该问题发生在管理员通过客户端策略强制实施更强的身份验证流程（例如强制设置双因素认证（2FA））时。用户在登录过程中手动访问特定的会话重启 Web 链接即可绕过该要求。此操作会清除用于跟踪所需安全步骤的内部标记，从而使用户仅使用密码即可登录，而无需完成强制的 2FA 设置。

CVSS 3.1 · Low
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I. Basic Information for CVE-2026-94218

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication session restart endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication (2FA) setup, through a client policy. A user can bypass this requirement by manually visiting a specific session restart web link during the login process. This action clears the internal markers that track the required security steps, allowing the user to log in with only a password and gain access without completing the mandated 2FA setup.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-94218

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III. Intelligence Information for CVE-2026-94218

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Vendor Advisories for CVE-2026-94218 (1)

Same Patch Batch · Red Hat · 2026-09-21 · 5 CVEs total

CVE-2026-15801 8.0 HIGH Cri-o: cri-o: insufficient validation during container checkpoint restore
CVE-2026-94215 5.5 MEDIUM Keycloak-services: keycloak-services: cross-realm client read/write via request-level cach
CVE-2026-94213 4.9 MEDIUM Keycloak-services: keycloak-services: authorization services policy evaluation endpoint le
CVE-2026-94217 3.5 LOW Keycloak-services: keycloak-services: uma scope merge across resource owners via resource

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-862

V. Comments for CVE-2026-94218

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