CVE-2026-3911

LOW

Keycloak - Authenticated Unauthorized User Attribute Exposure via UserResource Endpoint

Title source: llm
STIX 2.1

Description

A flaw was found in Keycloak. An authenticated user with the view-users role could exploit a vulnerability in the UserResource component. By accessing a specific administrative endpoint, this user could improperly retrieve user attributes that were configured to be hidden. This unauthorized information disclosure could expose sensitive user data.

References (4)

Core 4
Core References
Vendor Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-3911
Vendor Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2446392
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:6478
https://access.redhat.com/errata/RHSA-2026:6478
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:6477
https://access.redhat.com/errata/RHSA-2026:6477

Scores

CVSS v3 2.7
EPSS 0.0001
EPSS Percentile 2.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-359
Status published
Products (7)
org.keycloak/keycloak-services 0Maven
Red Hat/Red Hat build of Keycloak 26.4 26.4-14
Red Hat/Red Hat build of Keycloak 26.4 26.4.11-1
Red Hat/Red Hat build of Keycloak 26.4.11
redhat/build_of_keycloak
redhat/build_of_keycloak 26.4
redhat/build_of_keycloak 26.4.11
Published Mar 11, 2026
Tracked Since Mar 11, 2026