{"id":"CVE-2020-35509","aliases":["GHSA-rpj2-w6fr-79hc"],"url":"https://o3.security/vulnerability/CVE-2020-35509","summary":"Keycloak vulnerable to Improper Certificate Validation","details":"A flaw was found in keycloak affecting versions 11.0.3 and 12.0.0. An expired certificate would be accepted by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity.","published":"2022-08-23T16:15:08.950Z","modified":"2026-08-07T15:14:27.964736Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-core","fixedVersion":"14.0.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/cve-2020-35509"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:14:27.964736Z"}}