CVE-2026-0871
February 27, 2026
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.
Affected Packages
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=2.4.0.Final <26.5.1Fix Suggestion:
Update to version 26.5.1org.keycloak:keycloak-server-spi-private (JAVA):
Affected version(s) >=2.4.0.CR1 <26.5.2Fix Suggestion:
Update to version 26.5.2Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.9
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
EPSS
Base Score:
0.03
