{"id":"CVE-2026-67610","summary":"OpenEMR 8.2.0 OAuth2 Dynamic Client Registration Unauthorized FHIR Access","details":"OpenEMR through 8.2.0 contains an improper authentication vulnerability in the OAuth2 dynamic client registration endpoint that allows unauthenticated attackers to register a malicious client with system-level FHIR scopes by supplying a self-generated RSA keypair via the jwks field. Once an administrator approves the registered client, attackers can use the client_credentials grant with a self-signed JWT assertion to obtain access tokens granting read access to all FHIR resources across all patients in the system.","modified":"2026-08-05T03:32:40.761323115Z","published":"2026-08-03T16:02:47.081Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67610.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-306"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67610.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67610"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openemr-oauth2-dynamic-client-registration-unauthorized-fhir-access"},{"type":"PACKAGE","url":"https://github.com/openemr/openemr"},{"type":"EVIDENCE","url":"https://jivasecurity.com/writeups/openemr-unauth-oauth2-client-registration"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openemr/openemr","events":[{"introduced":"0"},{"last_affected":"6125a2fd8089c8bcc3848071c1293c60e27a7585"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"8.2.0"}]}}],"versions":["v8_2_0","v3_0_1","v3_0_0","v2_9_0","v2_8_3","v2_8_2","v2_8_1","v2_8_0","v2_7_3-rc1","v2_7_2","v2_7_2-rc2","v2_7_2-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67610.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}