{"id":"CVE-2023-6544","aliases":["GHSA-46c8-635v-68r2"],"url":"https://o3.security/vulnerability/CVE-2023-6544","summary":"Keycloak: authorization bypass","details":"A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.","published":"2024-04-25T15:58:47.204Z","modified":"2026-08-12T03:51:20.546172746Z","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-services","fixedVersion":"22.0.10"},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"24.0.3"}],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1860"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1861"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1862"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1864"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1866"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1867"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1868"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-6544"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6544.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6544"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2253116"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:20.546172746Z"}}