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CVE-2026-0871

MEDIUM CVSS 3.1: 4.9 EPSS 0.01%
Updated Feb 27, 2026
Keycloak
Parameter Value
CVSS 4.9 (MEDIUM)
Type CWE-266 (Incorrect Privilege Assignment)
Vendor Keycloak
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1