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CVE-2026-40509— OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter

Quick assessment

Affected
openemr openemr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openemr是OpenEMR组织开源的一个支持文档管理与企业应用场景的医疗信息管理平台。 OpenEMR 8.3.0之前版本存在跨站请求伪造漏洞，该漏洞源于DICOM viewer中的web_path GET参数未经验证作为URL嵌入，可能导致跨站请求伪造攻击，已认证用户被诱导发出认证请求，从而强制注销或执行其他状态更改操作。

CVSS 4.3 · Medium EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
openemr openemr < 8.3.0 affected
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I. Basic Information for CVE-2026-40509

Vulnerability Information
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Vulnerability Title
OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
OpenEMR before 8.3.0 contains a cross-site request forgery vulnerability in the DICOM viewer. The web_path GET parameter in the DICOM viewer page is embedded unsanitized as a URL without validation against expected path formats. An attacker can craft a URL that causes an authenticated user with Patients - Documents permissions to make authenticated requests to arbitrary OpenEMR endpoints, enabling forced logout and other state-changing actions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenEMR 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openemr是OpenEMR组织开源的一个支持文档管理与企业应用场景的医疗信息管理平台。 OpenEMR 8.3.0之前版本存在跨站请求伪造漏洞，该漏洞源于DICOM viewer中的web_path GET参数未经验证作为URL嵌入，可能导致跨站请求伪造攻击，已认证用户被诱导发出认证请求，从而强制注销或执行其他状态更改操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openemr openemr 0 ~ 8.3.0 -

II. Public POCs for CVE-2026-40509

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III. Intelligence Information for CVE-2026-40509

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Patches & Fixes for CVE-2026-40509 (1)

Vendor Advisories for CVE-2026-40509 (2)

Vendor Pages for CVE-2026-40509 (1)

Same Patch Batch · openemr · 2026-08-19 · 4 CVEs total

CVE-2026-40507 6.1 MEDIUM OpenEMR < 8.3.0 Reflected XSS via templateHtml Parameter in Patient Portal
CVE-2026-40508 5.4 MEDIUM OpenEMR < 8.3.0 Stored XSS via Patient Portal Template Import Handler
CVE-2026-76614 4.3 MEDIUM OpenEMR < 8.3.0 Path Traversal Information Disclosure via EDI Archive Restore

IV. Related Vulnerabilities

Same product: openemr
Same vendor: openemr
Same weakness: CWE-352

V. Comments for CVE-2026-40509

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