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Vulnerability · Published Jun 11, 2026 · Assigned by redhat

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

Medium 4.9

In plain English

A medium-severity security flaw in Red Hat build of Keycloak 26.6 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.3%top 77.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.keycloak:keycloak-rest-admin-ui-ext26.7.0GHSA-6w3v-mcfh-m3q7

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat build of Keycloak 26.6 see references
Red Hat Red Hat build of Keycloak 26.6 see references
Red Hat Red Hat build of Keycloak 26.6 see references
Red Hat Red Hat build of Keycloak 26.6.5 see references
Red Hat Red Hat build of Keycloak 26.6.5 see references
Red Hat Red Hat build of Keycloak 26.6.5 see references
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack see references

Weakness: CWE-425 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

References