CVE-2026-37980

6.9 MEDIUM

A flaw was found in Keycloak, specifically in the organization selection login page

Published: 2026-04-14 · Last updated: 2026-06-02

Severity and scoring

CVSS: 6.9 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N
CWE: CWE-79

Affected products

Vendor	Product
redhat	build_of_keycloak

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-37980
[Vendor advisory]https://access.redhat.com/security/cve/CVE-2026-37980
[Vendor advisory]https://bugzilla.redhat.com/show_bug.cgi?id=2455325

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