{"id":"CVE-2025-2559","summary":"Org.keycloak/keycloak-services: jwt token cache exhaustion leading to denial of service (dos) in keycloak","details":"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.","aliases":["GHSA-2935-2wfm-hhpv"],"modified":"2026-07-16T03:47:36.542722155Z","published":"2025-03-25T08:20:57.666Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2559.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:4335"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:4336"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-2559"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2559.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-2559"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2353868"},{"type":"REPORT","url":"https://github.com/keycloak/keycloak/issues/38576"},{"type":"FIX","url":"https://github.com/keycloak/keycloak/commit/a10c8119d4452b866b90a9019b2cc159919276ca"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/keycloak/keycloak","events":[{"introduced":"1d4ce3d8e9dbc9af996f9248996c78e145902a35"},{"introduced":"90f25533be7a7fe2f97e9c0d2040343a8e3e8738"},{"fixed":"7dca54e8dc0dbe23995e260c989c9ef2e9023a94"},{"fixed":"8d6046175da89a45c583821859ddf8ae5dfb4fcd"},{"fixed":"a10c8119d4452b866b90a9019b2cc159919276ca"}],"database_specific":{"extracted_events":[{"introduced":"23.0.0"},{"fixed":"26.0.11"},{"introduced":"26.1.0"},{"fixed":"26.1.5"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-2559.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}