CVE-2026-94215
Received Received - Intake

Keycloak Admin REST API Client Configuration Exposure via Improper Realm Validation

Publication date: 2026-09-21

Last updated on: 2026-09-21

Assigner: redhat-SADP

Description
A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the request path. This allows an administrator with limited privileges to read or modify sensitive client configurations in the master realm by accessing them through a realm they control. Successful exploitation could lead to the exposure of client credentials or the redirection of administrative login attempts to malicious sites.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-21
Last Modified
2026-09-21
Generated
2026-09-21
AI Q&A
2026-09-21
EPSS Evaluated
N/A
NVD
CVE-2026-94215
EUVD
EUVD-2026-83841

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
keycloak keycloak *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is in Keycloak's Admin REST API where a per-request cache resolves clients by UUID without checking if the client belongs to the requested realm. An attacker with limited admin privileges in a custom realm can access or modify sensitive client configurations in the master realm by exploiting this cache flaw.

Impact Analysis

An attacker could read client credentials, modify configurations like redirect URIs, or turn the master authorization endpoint into an open redirect. This could lead to credential theft, unauthorized access, or phishing attacks targeting administrators.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Exposure of client credentials or administrative access may result in compliance breaches and data protection failures.

Mitigation Strategies

Apply the latest Keycloak security patches if available. Restrict the create-realm role to only trusted administrators. Monitor Admin REST API logs for unusual client configuration changes or access patterns. Consider disabling the per-request in-memory cache if no patch is available.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-94215. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart