Red Hat · Keycloak · CVE-2023-6563
**Name of the Vulnerable Software and Affected Versions**
Keycloak (affected versions not specified)
**Description**
An unconstrained memory consumption issue was discovered. It can be triggered in environments with millions of offline tokens, specifically when there are more than 500,000 users, each having at least 2 saved sessions. If an attacker creates two or more user sessions and then opens the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions. This leads to excessive memory and CPU consumption, which could potentially crash the entire system.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.