What’s Vulnerable › Vulnerabilities

CVE-2026-17059: Keycloak-services: keycloak-services: information disclosure via role-users endpoint bypasses per-user view filter

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-24 · updated 2026-09-16
• Weakness: CWE-639

Description

A flaw was found in the role-users endpoint of the keycloak-services library, which is the core component of the Keycloak identity and access management solution. The issue occurs because the system fails to check if an administrator has permission to view individual users when listing members of a role. This allows a restricted administrator to see private information, such as names and email addresses, for users they should not be able to access.

Affected products

• Red Hat build of Keycloak 26.4: all versions

References

• https://access.redhat.com/errata/RHSA-2026:68277
• https://access.redhat.com/errata/RHSA-2026:68278
• https://access.redhat.com/security/cve/CVE-2026-17059
• https://bugzilla.redhat.com/show_bug.cgi?id=2506746

Get alerted when CVE-2026-17059 or the next vulnerability affects your stack