VULNERABILITY INTELLIGENCE
CVE-2025-2559
CVSS score4.9 MEDIUM
EPSS probability0.70%
CISA KEVNot currently listed
Published2025-03-25
Last modified2026-09-21
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Description
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.
Weakness classification
- secalert@redhat.com: CWE-770