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Keycloak Admin UI REST Extensions: bulk role-removal endpoints fail to perform granular permission checks

Moderate severity GitHub Reviewed Published Jun 11, 2026 to the GitHub Advisory Database • Updated Aug 19, 2026

Package

maven org.keycloak:keycloak-rest-admin-ui-ext (Maven)

Affected versions

< 26.7.0

Patched versions

26.7.0

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.

References

Published by the National Vulnerability Database Jun 11, 2026
Published to the GitHub Advisory Database Jun 11, 2026
Reviewed Aug 19, 2026
Last updated Aug 19, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(22nd percentile)

Weaknesses

Direct Request ('Forced Browsing')

The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files. Learn more on MITRE.

CVE ID

CVE-2026-11986

GHSA ID

GHSA-6w3v-mcfh-m3q7

Source code

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