An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system.
{
"severity": "HIGH",
"github_reviewed": true,
"cwe_ids": [
"CWE-770"
],
"nvd_published_at": "2023-12-14T18:15:45Z",
"github_reviewed_at": "2023-12-15T23:17:43Z"
}