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.

CVSS Details

CVSS 4.0 Base Score: 6.9
CVSS 3.1 Base Score: 7.2
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N)

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CVSS Details

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Global Threat Landscape Report

CVE-2026-124466: openemr: OpenEMR before 8.4.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make…

CVSS Details

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