Vulnerability Description
A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can view" setting for unmanaged attributes, allowing them to modify these attributes. This improper access control can lead to unauthorized changes to user profiles, even when the system is configured to restrict such modifications.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Build Of Keycloak | < 26.4.9 |
| Redhat | Keycloak | < 26.4.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:2365Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:2366Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-0871Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2428881Issue TrackingVendor Advisory
FAQ
What is CVE-2026-0871?
CVE-2026-0871 is a vulnerability with a CVSS score of 4.9 (MEDIUM). A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can view" setting for unmanaged attributes, allowing them to modify these attributes. ...
How severe is CVE-2026-0871?
CVE-2026-0871 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0871?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak, Redhat Keycloak.