Keycloak vulnerable to authorization bypass via the Admin API
A flaw was found in Keycloak. An authorization bypass vulnerability in the Keycloak Admin API allows any authenticated user, even those without administrative privileges, to enumerate the organization memberships of other users. This information disclosure occurs if the attacker knows the victim's unique identifier (UUID) and the Organizations feature is enabled.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.keycloak:keycloak-js-admin-client | <= 26.5.5 | no fix |
| npm package | @keycloak/keycloak-admin-client | <= 26.5.5 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-2366
- https://github.com/keycloak/keycloak/issues/47062
- https://access.redhat.com/errata/RHSA-2026:6477
- https://access.redhat.com/errata/RHSA-2026:6478
- https://access.redhat.com/security/cve/CVE-2026-2366
- https://bugzilla.redhat.com/show_bug.cgi?id=2439081
- https://github.com/keycloak/keycloak
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-639- Platform
- Java / Kotlin (Maven), npm
- Package
org.keycloak:keycloak-js-admin-client, @keycloak/keycloak-admin-client- Disclosed
- 12.03.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-r8jr-wg88-fq5c - CC BY 4.0
Vulnerability history: org.keycloak:keycloak-js-admin-client
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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