23 Oct 2026 15:48:27 UTC
Org.keycloak/keycloak-services: jwt token cache exhaustion leading to denial of service (dos) in keycloak
cve-program · CVE-2025-2559 · Published
CVE-2025-2559
Org.keycloak/keycloak-services: jwt token cache exhaustion leading to denial of service (dos) in keycloak
CVSS 3.1 4.9 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2025-2559
PublishedA 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.
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