CVE-2026-0871Org.keycloak/keycloak-services: keycloak: unauthorized modification of unmanaged user attributes by administrators
Updated under an hour ago ()
Does this affect you?
It affects Red Hat build of Keycloak 26.4 and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 4.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-266
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Analyzed
- Record last updated
- Mar 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat build of Keycloak 26.4 redhat:build_keycloak | from 26.4.9-1 not affected | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform 8 redhat:jboss_enterprise_application_platform | 8 | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp | All versions | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
redhat build_of_keycloak redhat:build_of_keycloak | before 26.4.9; all versions | NVD |
redhat keycloak redhat:keycloak | before 26.4.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:2365vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:2366vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-0871vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2428881issue-tracking, x-refsource-redhat, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.