{"id":"CVE-2026-124466","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-124466","summary":"OpenEMR before 8.4.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make the server send HTTP requests by registering an OAuth2 client…","details":"OpenEMR before 8.4.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make the server send HTTP requests by registering an OAuth2 client with an unvalidated jwks_uri. Attackers can trigger the fetch via the token introspection endpoint with an unsigned client_assertion to probe internal services and reach cloud metadata endpoints.","published":"2026-11-08T14:18:14.650","modified":"2026-11-08T14:18:14.650","cvss":{"score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/openemr/openemr/security/advisories/GHSA-mf6h-xc62-9fg4"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-unauthenticated-ssrf-via-oauth2-client-jwks-uri"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-08T14:18:14.650"}}