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CVE-2026-17059— Keycloak-services: keycloak-services: information disclosure via role-users endpoint bypasses per-user view filter

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.6
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.

Red Hat build of Keycloak是美国Red Hat公司开源的一款用于单点登录的Web应用。 Red Hat Build of Keycloak存在授权问题漏洞，该漏洞源于在列出角色成员时未能检查管理员是否有权限查看单个用户，可能导致受限管理员查看不应访问的用户私人信息（如姓名和电子邮件地址）。

CVSS 6.5 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 9

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.6 26.6.7-3< * unaffected
26.6-20< * unaffected
26.6-20< * unaffected
Red Hat Red Hat build of Keycloak 26.6.7 any unaffected
any unaffected
any unaffected
Red Hat Red Hat Data Grid 8 any unaffected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack any unaffected
Red Hat Red Hat Single Sign-On 7 any unaffected
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I. Basic Information for CVE-2026-17059

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: information disclosure via role-users endpoint bypasses per-user view filter
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the role-users endpoint of the keycloak-services library, which is the core component of the Keycloak identity and access management solution. The issue occurs because the system fails to check if an administrator has permission to view individual users when listing members of a role. This allows a restricted administrator to see private information, such as names and email addresses, for users they should not be able to access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Build of Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat build of Keycloak是美国Red Hat公司开源的一款用于单点登录的Web应用。 Red Hat Build of Keycloak存在授权问题漏洞，该漏洞源于在列出角色成员时未能检查管理员是否有权限查看单个用户，可能导致受限管理员查看不应访问的用户私人信息（如姓名和电子邮件地址）。
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 26.6 26.6.7-3 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-20 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-20 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.7 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.7 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.7 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat Data Grid 8 - cpe:/a:redhat:jboss_data_grid: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-2026-17059

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III. Intelligence Information for CVE-2026-17059

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Vendor Advisories for CVE-2026-17059 (4)

Same Patch Batch · Red Hat · 2026-07-24 · 10 CVEs total

CVE-2026-17107 8.5 HIGH Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluste
CVE-2026-66337 6.5 MEDIUM Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_
CVE-2026-66339 6.5 MEDIUM Libsoup: libsoup: proxy credentials leak to destination server via proxy-authorization hea
CVE-2026-17048 5.5 MEDIUM Keycloak-services: keycloak-services: vault-resolved rotated client secrets leaked via adm
CVE-2026-16743 5.5 MEDIUM Accountsservice: accountsservice: arbitrary file read via seticonfile for systemd-homed us
CVE-2026-16730 5.5 MEDIUM Dbus-broker: dbus-broker: session bus denial of service via emfile during peer setup
CVE-2026-16910 5.5 MEDIUM Quay: ssrf in red hat quay notification webhooks (slack/generic)
CVE-2026-66338 5.4 MEDIUM Libsoup: libsoup: http request smuggling via permissive chunk-size parsing in soup_body_in
CVE-2026-17039 3.1 LOW Pki-core: dogtag-pki: redhat-pki: pki-core: ca renewal request processing omits realm auth

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.6
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-17059

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