A flaw was found in Keycloak. An offline session continues to be valid when the offline_access scope is removed from the client. The refresh token is accepted and you can continue to request new tokens for the session. As it can lead to a situation where an administrator removes the scope, and assumes that offline sessions are no longer available, but they are.
Weakness
According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-operator-bundle:26.2.11-1 | * |
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-rhel9:26.2-12 | * |
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-rhel9-operator:26.2-12 | * |
| Red Hat build of Keycloak 26.2.11 | RedHat | * | |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-operator-bundle:26.4.4-1 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9:26.4-3 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9-operator:26.4-3 | * |
| Red Hat build of Keycloak 26.4.4 | RedHat | keycloak-server | * |
Potential Mitigations
References
- https://access.redhat.com/errata/RHSA-2025:21370
- https://access.redhat.com/errata/RHSA-2025:21371
- https://access.redhat.com/errata/RHSA-2025:22088
- https://access.redhat.com/errata/RHSA-2025:22089
- https://access.redhat.com/security/cve/CVE-2025-12110
- https://bugzilla.redhat.com/show_bug.cgi?id=2406033
- https://github.com/keycloak/keycloak/pull/43790