{"id":"CVE-2026-67610","title":"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 …","summary":"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 …","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-306"],"published":"2026-08-03","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:40:01.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67610","references":[{"url":"https://jivasecurity.com/writeups/openemr-unauth-oauth2-client-registration","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/openemr-oauth2-dynamic-client-registration-unauthorized-fhir-access","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00326,"epssPercentile":0.25923,"ingestedAt":"2026-09-09T21:22:45.522Z","slug":"CVE-2026-67610","body":"## Overview\n\nOpenEMR 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}