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CVE-2026-9088— Keycloak: keycloak: information disclosure due to user profile permission bypass

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.4
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，该漏洞源于具有委托访问权限读取组成员身份和用户的管理员可以通过访问组成员端点绕过用户配置文件权限，可能导致管理员查看明确配置为拒绝的用户属性，导致信息泄露。

CVSS 2.7 · Low EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

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-2026-9088

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: information disclosure due to user profile permission bypass
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in org.keycloak.services. An administrator with delegated access to read group memberships and users can bypass user profile permissions by accessing the group members endpoint. This allows the administrator to view user attributes that are explicitly configured to be denied, leading to information disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1220
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，该漏洞源于具有委托访问权限读取组成员身份和用户的管理员可以通过访问组成员端点绕过用户配置文件权限，可能导致管理员查看明确配置为拒绝的用户属性，导致信息泄露。
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-2026-9088

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III. Intelligence Information for CVE-2026-9088

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Vendor Advisories for CVE-2026-9088 (4)

Other References for CVE-2026-9088 (2)

Same Patch Batch · Red Hat · 2026-06-05 · 11 CVEs total

CVE-2026-11332 7.8 HIGH Ansible-core: argument injection in ansible-galaxy role install leads to arbitrary code ex
CVE-2026-50256 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font
CVE-2026-50257 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestro
CVE-2026-50259 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb s
CVE-2026-50258 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb k
CVE-2026-50260 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter(
CVE-2026-50261 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangeco
CVE-2026-50264 7.8 HIGH Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dr
CVE-2026-50262 5.5 MEDIUM Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in gl
CVE-2026-50263 5.5 MEDIUM Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information dis

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-1220

V. Comments for CVE-2026-9088

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