CVE-2026-19608
MediumCVSS 5.3Summary
A flaw was found in the group policy provider of Keycloak authorization services, which is used to manage fine-grained access control to resources. The issue occurs when the system evaluates group-based policies using tokens that only contain group names rather than full paths. If two groups in different parts of the organization share the same name, a user in the unauthorized group can be mistaken for a member of the authorized group. This can allow a user to gain unauthorized access to protected resources they should not be able to reach.
Risk Assessment
The risk includes unauthorized access to protected resources, which can lead to data confidentiality breaches and violation of organizational security policies.
Recommendation
It is recommended to update Keycloak to a patched version and change group policy configuration to use full group paths instead of just names.
Original NVD description (English source)
A flaw was found in the group policy provider of Keycloak authorization services, which is used to manage fine-grained access control to resources. The issue occurs when the system evaluates group-based policies using tokens that only contain group names rather than full paths. If two groups in different parts of the organization share the same name, a user in the unauthorized group can be mistaken for a member of the authorized group. This can allow a user to gain unauthorized access to protected resources they should not be able to reach.