{"id":"CVE-2026-124466","title":"OpenEMR before 8.4.0 Unauthenticated SSRF via OAuth2 Client jwks_uri","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 with an unvalidated jwks_uri. Attackers can trigger the…","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-918"],"vendor":"openemr","product":"openemr","affected":["openemr < 8.4.0"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T13:15:51.231Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-124466","references":[{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-mf6h-xc62-9fg4","label":"GitHub Security Advisory (GHSA-mf6h-xc62-9fg4)"},{"url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-unauthenticated-ssrf-via-oauth2-client-jwks-uri","label":"VulnCheck Advisory: OpenEMR before 8.4.0 Unauthenticated SSRF via OAuth2 Client jwks_uri"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T13:50:34.975Z","slug":"CVE-2026-124466","body":"## Overview\n\nOpenEMR 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.\n\n## Affected\n\n- `openemr < 8.4.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}