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CVE-2026-9792— Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.4
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在org.keycloak.protocol.oidc组件中，当使用特定条件提供程序强制执行安全限制时，reject-ropc-grant执行器被静默绕过，可能导致未经身份验证的远程攻击者通过资源所有者密码凭据授权获取令牌，即使策略明确配置为阻止此操作，从而导致未经授权的访问和信息泄露。

CVSS 6.5 · Medium EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.4 26.4.13-1< * unaffected
26.4-19< * unaffected
26.4-19< * unaffected
Red Hat Red Hat build of Keycloak 26.4.13 any unaffected
Red Hat Red Hat build of Keycloak 26.6 26.6.3-3< * unaffected
26.6-6< * unaffected
26.6-6< * unaffected
Red Hat Red Hat build of Keycloak 26.6.3 any unaffected
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I. Basic Information for CVE-2026-9792

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分权限或特权的处理不恰当
Source: CVE Program / CVE List V5
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，该漏洞源于在org.keycloak.protocol.oidc组件中，当使用特定条件提供程序强制执行安全限制时，reject-ropc-grant执行器被静默绕过，可能导致未经身份验证的远程攻击者通过资源所有者密码凭据授权获取令牌，即使策略明确配置为阻止此操作，从而导致未经授权的访问和信息泄露。
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 26.4.13-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.13 - cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.6 26.6.3-3 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-6 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-6 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.3 - cpe:/a:redhat:build_keycloak:26.6::el9

II. Public POCs for CVE-2026-9792

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 11615 chars
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III. Intelligence Information for CVE-2026-9792

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Vendor Advisories for CVE-2026-9792 (3)

Other References for CVE-2026-9792 (3)

Same Patch Batch · Red Hat · 2026-05-28 · 14 CVEs total

CVE-2026-4408 9.0 CRITICAL Samba: remote code execution in samr
CVE-2026-9804 7.7 HIGH Kubevirt: kubevirt: vmexport directory symlink escape enables exporter pod file read
CVE-2026-9795 7.3 HIGH Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
CVE-2026-44604 7.0 HIGH Rpm: command injection in rpmuncompress dountar() via unescaped archive top-level director
CVE-2026-9802 6.8 MEDIUM Keycloak: keycloak: unauthorized account access via replayed refresh tokens after cluster
CVE-2026-9796 6.5 MEDIUM Keycloak: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnera
CVE-2026-9793 5.9 MEDIUM Keycloak: keycloak: security policy bypass in jwe-encrypted request object processing
CVE-2026-9794 5.3 MEDIUM Keycloak: keycloak: information disclosure via saml ecp endpoint
CVE-2026-9803 5.3 MEDIUM Keycloak: keycloak: denial of service via malformed authorization header
CVE-2026-9801 4.9 MEDIUM Keycloak: keycloak: denial of service via malformed ldap password policy response
CVE-2026-9791 4.3 MEDIUM Keycloak-rhel9: organization data leak after feature disabled in keycloak
CVE-2026-9798 4.3 MEDIUM Keycloak: keycloak: brute-force protection bypass in ciba flow
CVE-2026-10028 4.3 MEDIUM Glib-networking: infinite loop in glib-networking gnutls backend allows remote denial of s

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-280

V. Comments for CVE-2026-9792

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