Answer in brief
CVE-2026-0871 records a Medium severity (CVSS 4.9) vulnerability in Keycloak Server Private SPI: Improper Access Control Allows Administrators to Bypass Attribute Visibility Restrictions and Modify Unmanaged User Profile Attributes. The current sources do not mark it as known exploited. The current feed maps org.keycloak:keycloak-server-spi-private (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.keycloak:keycloak-server-spi-private (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.keycloak:keycloak-server-spi-privatemaven | >=0 <26.5.2 | 26.5.2 |
Published upstream
Feb 27, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
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.
Quoted source text, attributed separately from HOL analysis.