What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-11 · updated 2026-08-11
• Weakness: CWE-425

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.

Affected products

• Red Hat build of Keycloak 26.4: from 26.6 before 26.6.5 — fixed in 26.6.5

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.6.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:50848
• https://access.redhat.com/errata/RHSA-2026:50849
• https://access.redhat.com/security/cve/CVE-2026-11986
• https://bugzilla.redhat.com/show_bug.cgi?id=2487906

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