Main Vulnerability Database Vulnerabilities #VU146997

Missing Authorization in Keycloak - CVE-2026-9088

Published: September 5, 2026

Vulnerability identifier: #VU146997

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-9088

CWE-ID: CWE-862

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to disclose group member information.

The vulnerability exists due to improper access control in the Group Members Endpoint when handling group member requests. A remote user can send a group member request to disclose group member information.

Affected software

Keycloak
Red Hat build of Keycloak

How to mitigate CVE-2026-9088

Install security update from vendor's website.

Keycloak - update to 26.6.3
Red Hat build of Keycloak - addressed in versions 26.4.13, 26.6.3

External References

https://github.com/keycloak/keycloak/releases/tag/26.6.3
https://github.com/keycloak/keycloak/issues/49174

Related Security Bulletins