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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-37980)

Keycloak versions installed prior to 26.6.2 are affected by multiple vulnerabilities, including:

  - A flaw was found in Keycloak's redirect URI validation logic. An attacker can bypass     validation to redirect users to malicious sites, potentially leading to phishing attacks and     credential theft. (CVE-2026-7504)

  - A session fixation vulnerability exists in the OIDC login flow. An unauthenticated attacker     can pre-create sessions leading to account takeover if a user logs in using the attacker's     session. (CVE-2026-7507)

  - A flaw was found in Keycloak's SAML endpoint processing. A crafted XML request to the SAML     endpoint can cause a denial of service by consuming excessive server resources. (CVE-2026-7307)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
476895	SCA: security update for org.keycloak:keycloak-services (GHSA-m32f-8vh9-2hh3)	Tenable Cloud Security	SCA Checks	Local	medium
476895	SCA: security update for org.keycloak:keycloak-services (GHSA-m32f-8vh9-2hh3)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
316461	Keycloak < 26.6.2 Multiple Vulnerabilities	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-37980

medium

Tenable Plugins

medium

medium

medium