CVE-2026-17059 Red Hat CVE debrief

Who should care

Administrators and users of the Keycloak identity and access management solution should be aware of this vulnerability and take necessary defensive actions. This includes reviewing and updating access controls, verifying administrator permissions and role assignments, and monitoring for potential unauthorized access attempts. Affected operator, platform, vulnerability-management, and security-team impact require review and potential updates to defensive priorities and actions. Compensating controls may be necessary for exposed systems while remediation is scheduled and verified. Monitoring and detection logs should be reviewed for exposed assets that need extra review. Exceptions should be tracked, and remediated assets should be retested before closing the item, with evidence documented. Asset inventory and source tracking may also be necessary to address this vulnerability effectively. Review relevant compensating controls and implement additional security measures as needed to mitigate potential impacts. Consider implementing additional monitoring and detection measures to identify potential security incidents related to this vulnerability. Review and update incident response plans to address potential security incidents related to this vulnerability. Consider conducting a thorough review of system configurations and security controls to ensure they are adequate and effective in preventing similar vulnerabilities in the future. Review and update security policies and procedures as needed to address potential security risks associated with this vulnerability. Consider providing additional training to administrators and users on the potential impacts of this vulnerability and the necessary defensive actions to take. Review and update access controls to ensure that they are adequate and effective in preventing unauthorized access to sensitive information. Consider implementing additional security measures, such as multi-factor authentication, to prevent unauthorized access to sensitive information. Review and update incident response plans to address potential security incidents related to this vulnerability. Consider conducting a thorough review of system logs,

Technical summary

The keycloak-services library, a core component of the Keycloak identity and access management solution, has a flaw in its role-users endpoint. The system fails to check if an administrator has permission to view individual users when listing members of a role, allowing restricted administrators to access private user information. This vulnerability impacts administrators and users of the Keycloak identity and access management solution. Affected product deployments require review and potential updates.

Defensive priority

Medium-priority defensive actions are required to address this vulnerability.

Recommended defensive actions

• Review and update access controls for the role-users endpoint
• Verify administrator permissions and role assignments
• Monitor for potential unauthorized access attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details about the vulnerability. Vendor advisories and issue tracking information are available. The keycloak-services library, a core component of the Keycloak identity and access management solution, has a flaw in its role-users endpoint. This issue allows restricted administrators to access private user information. Evidence limits suggest verifying affected scope and vendor guidance. Defenders should review official advisories and track exceptions.

Official resources