# CVE-2026-102940: OpenEMR: Missing Write ACL Allows Unauthorized Document Reassignment

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 8.4.0, controllers/C_Document.class.php write actions, including move_action_process(), do not verify the caller's access to the source document, current patient and category, or destination patient and category before Document::change_patient() performs the mutation. A low-privilege authenticated user can reassign an arbitrary document to a patient or category the user can access and then retrieve it through the normally protected read path. The reassignment occurs before a later list rendering check, so a final HTTP 403 response does not mean the unauthorized write was blocked. This issue is fixed in version 8.4.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- openemr / openemr: < 8.4.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 9.6 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

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

- Weaknesses: CWE-639

## Exploit evidence

- exploit: https://github.com/openemr/openemr/security/advisories/GHSA-92rh-g949-4mvv (ADP: CISA-ADP)

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-92rh-g949-4mvv (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/openemr/openemr/pull/13353 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/openemr/openemr/commit/312b5d042f7fa49cc78ebed041155fba339a991c (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-92rh-g949-4mvv (ADP: CISA-ADP; exploit)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-102940; retrieved 2026-11-05; source updated 2026-11-05

Revision: c906fc17693c59d5e08dbb1d834e930c54175e02b914d1df183c8d0a4e1355cb

Canonical: https://y2.dev/cve/CVE-2026-102940

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