CVE-2026-16108Network attack vector

Hidden-group disclosure via missing FGAP view filters

Published Jul 17, 2026 · Updated Jul 17, 2026

Information disclosure in Red Hat build of Keycloak allows remote authenticated users to read hidden default-group names and identifiers. RealmAdminResource and RealmsAdminResource return default groups in realm details, listings, and the default-groups endpoint without applying FGAP v2 per-group view filters. A delegated administrator needs realm-view permission while lacking view permission for specific groups; exposure is limited to group names, UUIDs, and paths.

CVSS severity4.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Red Hat build of Keycloak allows remote authenticated users to read hidden default-group names and identifiers. RealmAdminResource and RealmsAdminResource return default groups in realm details, listings, and the default-groups endpoint without applying FGAP v2 per-group view filters. A delegated administrator needs realm-view permission while lacking view permission for specific groups; exposure is limited to group names, UUIDs, and paths.

The record

CVE
CVE-2026-16108
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-200, T1069
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat build of KeycloakAffected versions are unavailable in this record.

Published CVSS scores

4.3Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1069Permission Groups Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo