CVE-2026-37980: Red Hat Build Of Keycloak

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in Keycloak, specifically in the organization selection login page. A remote attacker with `manage-realm` or `manage-organizations` administrative privileges can exploit a Stored Cross-Site Scripting (XSS) vulnerability. This flaw occurs because the `organization.alias` is placed into an inline JavaScript `onclick` handler, allowing a crafted JavaScript payload to execute in a user's browser when they view the login page. Successful exploitation enables arbitrary JavaScript execution, potentially leading to session theft, unauthorized account actions, or further attacks against users of the affected realm.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-04-14. Last modified 2026-06-17.