low3.1
CVE-2026-2366
Keycloak vulnerable to authorization bypass via the Admin API
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @keycloak/keycloak-admin-client | <= 26.5.5 | none recorded |
| maven | org.keycloak:keycloak-js-admin-client | <= 26.5.5 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | from 26.4 before 26.4.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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/advisories/GHSA-r8jr-wg88-fq5c
- https://nvd.nist.gov/vuln/detail/CVE-2026-2366
- https://github.com/keycloak/keycloak/issues/47062