CVE-2026-18571

Keycloak-services: keycloak-services: fgap v2 group assignment bypass during user creation

Published: Aug 2, 2026Updated: Sep 16, 2026 Sources: CVE List NVDCWE-862

6.6MEDIUM

Description

A flaw was found in the user creation component of Keycloak when Fine-Grained Admin Permissions V2 (FGAP V2) is enabled. This issue allows a sub-administrator with permission to create users to add those users to any group, even groups the sub-administrator is not authorized to manage. This could lead to unauthorized access to sensitive information or elevated privileges for the newly created users.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:HPrivileges Required

High

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-862

Affected Products

Red Hat

commercial·USaka redhat

build of keycloakOn-prem

Operating Systems / linux-distro

Red Hat build of Keycloak 26.6On-prem

Security Products / identity-access-mgmt

Red Hat build of Keycloak 26.6.7On-prem

Operating Systems / linux-distro

Red Hat Data Grid 8On-premDatabase

Databases / cache-message-queue

Red Hat JBoss Enterprise Application Platform Expansion PackOn-premOS

Operating Systems / linux-distro

Red Hat Single Sign-On 7On-premSecurity Product

Security Products / identity-access-mgmt

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://access.redhat.com/errata/RHSA-2026:68277

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:68278

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-18571

access.redhat.com

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