CVE-2026-9088Public exploitNetwork attack vector

Restricted attribute disclosure via group-members endpoint

Published Jun 5, 2026 · Updated Jun 5, 2026

Information disclosure in Red Hat build of Keycloak 26.4 and 26.6 allows remote authenticated users to read restricted user attributes. The /admin/realms/{realm}/groups/{id}/members endpoint returns full user representations without applying user-profile attribute view permissions. Exploitation requires a delegated administrator who can view users and group memberships; the bypass exposes denied attributes but does not alter them.

CVSS severity2.7
Low
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Red Hat build of Keycloak 26.4 and 26.6 allows remote authenticated users to read restricted user attributes. The /admin/realms/{realm}/groups/{id}/members endpoint returns full user representations without applying user-profile attribute view permissions. Exploitation requires a delegated administrator who can view users and group memberships; the bypass exposes denied attributes but does not alter them.

The record

CVE
CVE-2026-9088
Published
Jun 5, 2026
Updated
Jun 5, 2026
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-1220
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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

2.7Red HatCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1220Insufficient Granularity of Access Control

Public exploit references

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

Technologies

Your stack

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Your stack

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