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CVE-2026-89298— Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get

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.

Keycloak（一种开源的身份与访问管理解决方案）的动态客户端注册服务中存在一个缺陷。当拥有“view-clients”（查看客户端）角色的用户访问客户端注册端点以获取客户端详情时，会触发该问题。由于未能对敏感信息进行掩码处理，服务会以明文形式返回客户端的机密密钥（confidential secret）。这使得只读管理员能够获取受影响客户端账户的完整访问权限，并可能在当前 Realm（领域）内进一步提升其权限。

CVSS 4.9 · Medium

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2026-89298

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive information, the service returns the client's confidential secret in cleartext. This could allow a read-only administrator to obtain full access to the affected client's account and potentially escalate their privileges within the realm.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
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-2026-89298

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III. Intelligence Information for CVE-2026-89298

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Vendor Advisories for CVE-2026-89298 (1)

Other References for CVE-2026-89298 (1)

Same Patch Batch · Red Hat · 2026-09-11 · 5 CVEs total

CVE-2026-89060 7.7 HIGH Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multiclu
CVE-2026-18495 6.1 MEDIUM Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
CVE-2026-77159 5.5 MEDIUM Libvirt: unsafe chown in qemutpmemulatorpreparehost() allows arbitrary file ownership chan
CVE-2026-88914 4.4 MEDIUM Gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux cea

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-200

V. Comments for CVE-2026-89298

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