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CVE Vulnerability Details :
CVE-2026-0871
PUBLISHED
More InfoOfficial Page
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
View Known Exploited Vulnerability (KEV) details
Published At-27 Feb, 2026 | 07:30
Updated At-27 Feb, 2026 | 07:30
Rejected At-
▼CVE Numbering Authority (CNA)
Org.keycloak/keycloak-services: keycloak: unauthorized modification of unmanaged user attributes by administrators

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 Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-operator-bundle
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4.9-1 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4-11 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9-operator
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4-10 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4.9
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat JBoss Enterprise Application Platform 8
Collection URL
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jboss_enterprise_application_platform:8
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat JBoss Enterprise Application Platform Expansion Pack
Collection URL
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jbosseapxp
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Single Sign-On 7
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:red_hat_single_sign_on:7
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-266Incorrect Privilege Assignment
Type: CWE
CWE ID: CWE-266
Description: Incorrect Privilege Assignment
Metrics
VersionBase scoreBase severityVector
3.14.9MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Version: 3.1
Base score: 4.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Metrics Other Info
Red Hat severity rating
value:
Moderate
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Exploits

Credits

Timeline
EventDate
Reported to Red Hat.2026-01-13 08:32:26
Made public.2025-01-13 08:08:00
Event: Reported to Red Hat.
Date: 2026-01-13 08:32:26
Event: Made public.
Date: 2025-01-13 08:08:00
Replaced By

Rejected Reason

References
HyperlinkResource
https://access.redhat.com/errata/RHSA-2026:2365
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2366
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-0871
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2428881
issue-tracking
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:2365
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:2366
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-0871
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2428881
Resource:
issue-tracking
x_refsource_REDHAT
Details not found