Keycloak Server Private SPI: Improper Access Control Allows Administrators to Bypass Attribute Visibility Restrictions and Modify Unmanaged User Profile Attributes
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.keycloak:keycloak-server-spi-private | < 26.5.2 | 26.5.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-0871
- https://github.com/keycloak/keycloak/issues/45873
- https://github.com/keycloak/keycloak/commit/9d0f679ecea405958f167fcd0f4a6db6ae32c3fa
- https://access.redhat.com/errata/RHSA-2026:2365
- https://access.redhat.com/errata/RHSA-2026:2366
- https://access.redhat.com/security/cve/CVE-2026-0871
- https://bugzilla.redhat.com/show_bug.cgi?id=2428881
- https://github.com/keycloak/keycloak
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-266, CWE-284- Platform
- Java / Kotlin (Maven)
- Package
org.keycloak:keycloak-server-spi-private- Disclosed
- 27.02.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v4jw-m6rm-399h - CC BY 4.0
Vulnerability history: org.keycloak:keycloak-server-spi-private
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 02.2022 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 5
- Low 1
Disclosures per year
- 2022: 1
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 5
-
Keycloak Server Private SPI: Improper Access Control Allows Administrators to Bypass Attribute Visibility Restrictions and Modify Unmanaged User Profile Attributes this entry
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