CVE-2025-68833: HCL Hive Keycloak Auth Bypass Vulnerability

CVE-2025-68833 Overview

CVE-2025-68833 affects the HCL Hive Keycloak Identity and Access Management (IAM) instance. The vulnerability stems from insufficient granularity of access control [CWE-1240], allowing an attacker unauthorized access to protected resources. The flaw is remotely exploitable over the network without authentication or user interaction, though impact is limited to confidentiality. HCL Software has documented the issue in a knowledge base article. No public exploit code or in-the-wild exploitation has been reported.

Critical Impact
Unauthenticated network attackers can bypass access control granularity in the Keycloak IAM instance to read resources they should not be able to reach.

Affected Products

HCL Hive Keycloak IAM Instance

Discovery Timeline

2026-08-24 - CVE-2025-68833 published to NVD
2026-08-24 - Last updated in NVD database

Technical Details for CVE-2025-68833

Vulnerability Analysis

The HCL Hive Keycloak IAM instance enforces access control at a coarser level than the resources it protects require. This condition maps to [CWE-1240]: use of a cryptographic or authorization primitive with insufficient granularity. In practice, a single access control decision applies to a broader scope of resources than intended, letting a caller reach data that policy should isolate.

Because Keycloak sits at the identity layer, insufficient granularity in its authorization model propagates to every downstream service that trusts its tokens. Applications relying on HCL Hive for authorization can therefore leak information without any explicit application-layer flaw.

The CVSS metrics indicate that only confidentiality is affected. Integrity and availability remain intact, and the attack requires no privileges or user interaction.

Root Cause

The root cause is a design-level access control weakness in how the Keycloak IAM instance scopes authorization decisions. HCL's knowledge base article describes the affected component and fixed builds. Insufficient granularity typically arises when a single role, scope, or policy check gates resources that require distinct authorization decisions per object or tenant.

Attack Vector

An unauthenticated attacker sends crafted requests over the network to the exposed Keycloak IAM endpoints. Because the check applied by the IAM instance is broader than the resource boundary, the request succeeds and returns data the caller is not entitled to. No credentials, tokens, or user interaction are required.

Refer to the HCL Software Knowledge Base Article for vendor-specific request paths and affected endpoints.

Detection Methods for CVE-2025-68833

Indicators of Compromise

Unauthenticated HTTP requests to Keycloak admin, account, or token endpoints returning 2xx responses for resources outside the caller's tenant or realm.
Access logs showing repeated enumeration of realm, client, or user identifiers from a single source IP.
Responses containing user, group, or client metadata delivered without a corresponding valid bearer token.

Detection Strategies

Inspect Keycloak audit and event logs for LOGIN, CODE_TO_TOKEN, and admin API events that lack an associated authenticated principal.
Compare authorization decisions against resource ownership metadata to identify cross-realm or cross-tenant access.
Alert on anomalous read volume against IAM APIs, particularly /admin/realms/* and /auth/realms/*/users paths.

Monitoring Recommendations

Ship Keycloak event logs to a centralized SIEM or data lake with OCSF normalization for correlation with downstream application logs.
Baseline normal API call patterns per client and alert on deviations in request rate or response size.
Monitor upstream WAF or reverse proxy telemetry for unauthenticated requests reaching IAM endpoints that should require tokens.

How to Mitigate CVE-2025-68833

Immediate Actions Required

Review the HCL Software Knowledge Base Article and apply the vendor-supplied fix for the HCL Hive Keycloak IAM instance.
Restrict network exposure of the Keycloak administration and account APIs to trusted management networks only.
Rotate client secrets and audit issued tokens for any accounts that may have been enumerated during the exposure window.

Patch Information

HCL Software has published remediation guidance in KB0131731. Follow the vendor's upgrade path to the fixed HCL Hive release that corrects the access control granularity in the Keycloak IAM component.

Workarounds

Place the IAM instance behind an authenticating reverse proxy or API gateway that enforces per-resource authorization until the patch is applied.
Apply fine-grained Keycloak authorization policies that scope client roles and resource permissions to individual realms and tenants.
Disable or restrict any Keycloak endpoints not required for production operation, including unused admin REST paths.

bash

# Example: restrict Keycloak admin API to a management CIDR at the proxy layer
# nginx snippet
location /auth/admin/ {
    allow 10.10.0.0/24;
    deny all;
    proxy_pass http://keycloak-upstream;
}