CVE-2026-9791
Medium
Description
A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Redhat Build Of Keycloak
PublishedMay 28, 2026
First seenMay 28, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- org.keycloak:keycloak-server-spi-private26.6.3 or later
- org.keycloak:keycloak-services26.6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat build_of_keycloak | No range specified | — |
| org.keycloak:keycloak-server-spi-privateMaven | 26.5.0 ≤ v < 26.6.3, v ≤ 26.4.7 | 26.6.3 |
| org.keycloak:keycloak-servicesMaven | 26.5.0 ≤ v < 26.6.3, v ≤ 26.4.7 | 26.6.3 |
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