Medium severity4.9NVD Advisory· Published Feb 27, 2026· Updated Jun 17, 2026
CVE-2026-0871
CVE-2026-0871
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-server-spi-privateMaven | < 26.5.2 | 26.5.2 |
Affected products
8- Red Hat/Red Hat build of Keycloak 26.4.9v5cpe:/a:redhat:build_keycloak:26.4::el9
- cpe:/a:redhat:jboss_enterprise_application_platform:8
- cpe:/a:redhat:jbosseapxp
- cpe:/a:redhat:red_hat_single_sign_on:7
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*range: <26.4.9
- cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
Patches
Vulnerability mechanics
References
8- access.redhat.com/errata/RHSA-2026:2365nvdVendor AdvisoryWEB
- access.redhat.com/errata/RHSA-2026:2366nvdVendor AdvisoryWEB
- access.redhat.com/security/cve/CVE-2026-0871nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-v4jw-m6rm-399hghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-0871ghsaADVISORY
- github.com/keycloak/keycloak/commit/9d0f679ecea405958f167fcd0f4a6db6ae32c3faghsaWEB
- github.com/keycloak/keycloak/issues/45873ghsaWEB
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