CVE-2023-6563 — Keycloak: offline session token dos
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 eac…
Published: 2023-12-14 · CVSS: 7.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7