OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter (CVE-2026-40509) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-40509

OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter

Answer in brief

CVE-2026-40509 records a Unknown severity vulnerability in OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path Parameter. The current sources do not mark it as known exploited. The current feed maps openemr/openemr (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2026Updated Aug 19, 2026Source checked Aug 19, 2026First seen by HOL Aug 19, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openemr/openemr (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openemr/openemrgeneric	>=0 <8.3.0	8.3.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for openemr/openemr.
Review the reported fix. Update openemr/openemr to 8.3.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.