Red Hat Keycloak organization.alias cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in Red Hat Keycloak. This affects an unknown function. Such manipulation of the argument organization.alias leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-37980. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Keycloak (the affected version unknown) and classified as problematic. Affected by this issue is an unknown part. The manipulation of the argument organization.alias with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at access.redhat.com. This vulnerability is handled as CVE-2026-37980 since 04/06/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/14/2026). The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Red Hat

Name

• Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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