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CVE-2026-11986— Keycloak-rest-admin-ui-ext: authorization bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints of keycloak

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.

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，该漏洞源于批量角色移除端点未能执行细粒度权限检查，可能导致具有有限权限的委派管理员从其他用户或组中移除高特权角色，从而破坏管理访问控制。

CVSS 4.9 · Medium EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 7

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.6 26.6.5-1< * unaffected
26.6-11< * unaffected
26.6-11< * unaffected
Red Hat Red Hat build of Keycloak 26.6.5 any unaffected
any unaffected
any unaffected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack any unaffected
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I. Basic Information for CVE-2026-11986

Vulnerability Information
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Vulnerability Title
Keycloak-rest-admin-ui-ext: authorization bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints of keycloak
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
直接请求(强制性浏览)
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，该漏洞源于批量角色移除端点未能执行细粒度权限检查，可能导致具有有限权限的委派管理员从其他用户或组中移除高特权角色，从而破坏管理访问控制。
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 26.6.5-1 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-11 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-11 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.5 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.5 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.5 - cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack - cpe:/a:redhat:jbosseapxp

II. Public POCs for CVE-2026-11986

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III. Intelligence Information for CVE-2026-11986

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Vendor Advisories for CVE-2026-11986 (4)

Same Patch Batch · Red Hat · 2026-06-11 · 5 CVEs total

CVE-2026-11774 7.6 HIGH 389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leadi
CVE-2026-53701 6.5 MEDIUM Gstreamer1-plugins-bad-free: gstreamer: out-of-bounds write in h.266/vvc pps picture parti
CVE-2026-53702 6.5 MEDIUM Gstreamer1-plugins-bad-free: gstreamer: stack buffer overflow in h.265 buffering period se
CVE-2026-11850 5.0 MEDIUM Krb5: krb5: integer underflow in berval2tl_data() leads to heap out-of-bounds read

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.6
Same vendor: Red Hat
Same weakness: CWE-425

V. Comments for CVE-2026-11986

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