# CVE-2026-16108

## Summary

- **CVE ID:** CVE-2026-16108
- **Severity:** MEDIUM
- **CVSS Score:** 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **CWE:** CWE-1220
- **Published:** Jul 17, 2026
- **Last Modified:** Aug 31, 2026

## Description

A flaw was found in the default-groups REST endpoint and realm representation of Keycloak. This component is responsible for managing groups that are automatically assigned to new users within a realm. The issue allows a delegated administrator with realm-viewing permissions to see the names and identifiers of hidden default groups, even if they lack the specific permissions to view those groups. This can lead to the exposure of sensitive organizational structures or internal group names.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-16108)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2501740)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 7.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._