CVE-2026-3429— Org.keycloak.services.resources.account: improper access control leading to mfa deletion and account takeover in keycloak account rest api
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I. Basic Information for CVE-2026-3429
Vulnerability Information
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Vulnerability Title
Org.keycloak.services.resources.account: improper access control leading to mfa deletion and account takeover in keycloak account rest api
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtained a victim’s password can delete the victim’s registered MFA/OTP credential without first proving possession of that factor. The attacker can then register their own MFA device, effectively taking full control of the account. This weakness undermines the intended protection provided by multi-factor authentication.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于Account REST API存在访问控制不当，可能导致低安全级别用户执行敏感操作，进而导致账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.11-1 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-14 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-14 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4.11 | - | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| 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 JBoss Enterprise Application Platform 8 | - | cpe:/a:redhat:jboss_enterprise_application_platform:8 | |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | - | cpe:/a:redhat:jbosseapxp | |
| Red Hat | Red Hat Single Sign-On 7 | - | cpe:/a:redhat:red_hat_single_sign_on:7 |
II. Public POCs for CVE-2026-3429
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|---|
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IV. Related Vulnerabilities
Same product: Red Hat build of Keycloak 26.4
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Keycloak: keycloak: information disclosure via authorization - CVE-2026-3911
Org.keycloak.services.resources.admin.userresource: keycloak
Same vendor: Red Hat
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Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-284
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UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2026-3429
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