Description
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: 2026-11-08
Score: 6.9 Medium
EPSS: n/a
KEV: No
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Remediation

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Tracking

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Advisories

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History

Sun, 08 Nov 2026 13:30:00 +0000

Type Values Removed Values Added
Description 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.
Title OpenEMR before 8.4.0 Unauthenticated SSRF via OAuth2 Client jwks_uri
First Time appeared Open-emr
Open-emr openemr
Weaknesses CWE-918
CPEs cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*
Vendors & Products Open-emr
Open-emr openemr
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}

Subscriptions

Open-emr Openemr
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-08T13:15:51.231Z

Reserved: 2026-11-08T02:16:30.558Z

Link: CVE-2026-124466

cve-icon Vulnrichment

No data.

cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses