What is CVE-2026-124466?

CVE-2026-124466 is a high-severity vulnerability in Openemr, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-11-08.

How severe is CVE-2026-124466?

High severity. CVSS v3 base score is 7.2 out of 10.

SSRF in Openemr

CVE-2026-124466

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Openemr

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

GitHub Security Advisory (GHSA-mf6h-xc62-9fg4) (vendor-advisory)
VulnCheck Advisory: OpenEMR before 8.4.0 Unauthenticated SSRF via OAuth2 Client jwks_uri (third-party-advisory)

Frequently asked questions

What is CVE-2026-124466?: CVE-2026-124466 is a high-severity vulnerability in Openemr, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-11-08.
How severe is CVE-2026-124466?: High severity. CVSS v3 base score is 7.2 out of 10.