CVE-2025-2559 — Org.keycloak/keycloak-services: jwt token cache exhaustion leading to denial of service (dos) in keycloak
A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively …
Published: 2025-03-25 · CVSS: 4.9 · CVSS 3.1
A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively long expiration time, for example, 24 or 48 hours, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7