Authorization Bypass Through User-Controlled Key Affecting org.keycloak:keycloak-services package, versions [,26.4.13)[26.5.0,26.6.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published4 Jul 2026
- disclosed25 Jun 2026
- creditUnknown
Introduced: 25 Jun 2026
CVE-2026-9099 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-services to version 26.4.13, 26.6.4 or higher.
Overview
org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the addChild endpoint in the Admin REST API when Fine-Grained Admin Permissions v2 are enabled. An attacker with delegated manage-members permissions on a low-privilege group can bypass authorization checks to reparent any group, including those with elevated privileges, under their control. This enables the attacker to reset passwords of members in the targeted group and potentially take over the entire realm by compromising privileged accounts.
Workaround
This vulnerability can be mitigated by restricting network access to the Admin REST API to only trusted networks or localhost.