# CVE-2026-115573: OpenEMR: Broken Access Control in controller.php Enables Insurance Routing Credential Hijack and PHI Enumeration

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, library/classes/Controller.class.php allows explicit controller.php dispatch to controllers missing from CONTROLLER_ACL_MAP, and checkControllerAcl() returns without enforcing any permission for those entries. A low-privilege authenticated user can invoke C_X12Partner::edit_action_process() to create or alter insurance-routing hosts and credentials, or invoke C_PatientFinder::find_action_process() to enumerate patient names, dates of birth, and identifiers. The shared fail-open dispatcher root cause also exposes other administrative controllers that were intended to be reached through ACL-gated Practice Settings routes. 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: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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-862

## Exploit evidence

- exploit: https://github.com/openemr/openemr/security/advisories/GHSA-9rj4-fxmj-c4r7 (ADP: CISA-ADP)

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-9rj4-fxmj-c4r7 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/openemr/openemr/pull/13565 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/openemr/openemr/commit/64f8491d850b2e22ed4fceb14fa67e27fef62cd1 (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-9rj4-fxmj-c4r7 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-115573; retrieved 2026-11-05; source updated 2026-11-05

Revision: f61291b5eed750bb4695bd20585253ca1254666ee22197823a7c07bd9239a99d

Canonical: https://y2.dev/cve/CVE-2026-115573

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