# CVE-2026-103939: OpenEMR: Weno `file_download.php`: missing ACL/CSRF truncates the e-prescribing pharmacy directory

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.3.0, interface/modules/custom_modules/oe-module-weno/scripts/file_download.php has no ACL or CSRF check and ignores the result of validateAdminCredentials(). When the Weno module is enabled, the default GET path calls PharmacyService::removeWenoPharmacies() before attempting a refetch, allowing any authenticated user to truncate the weno_pharmacy table and allowing a cross-site request to trigger the same operation through a logged-in victim. A failed later download can leave the e-prescribing pharmacy directory empty and unavailable. This issue is fixed in version 8.3.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- openemr / openemr: < 8.3.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

- exploit: https://github.com/openemr/openemr/security/advisories/GHSA-xhv3-qr55-56h3 (ADP: CISA-ADP)

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-xhv3-qr55-56h3 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/openemr/openemr/pull/13197 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/openemr/openemr/commit/f760adc7bddaf9d118e1a0d40590e686783ed21b (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/openemr/openemr/releases/tag/v8_3_0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/openemr/openemr/security/advisories/GHSA-xhv3-qr55-56h3 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-103939; retrieved 2026-11-05; source updated 2026-11-05

Revision: 4e76b8aeb0458637ee30d7a3312927e49fc333a21e8843b778d1ce797c7351c6

Canonical: https://y2.dev/cve/CVE-2026-103939

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