Missing Authorization in OpenEMR - CVE-2026-126447
Published: November 10, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU164461
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126447
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to impersonate the clinic's Direct messaging identity and send fraudulent clinical communications.
The vulnerability exists due to missing authorization in OpenEMR's trusted-messages-ajax.php handler when processing message-only requests with Direct/phiMail enabled and configured with clinic credentials. A remote user can submit a chosen recipient and message body without the patients/notes permission to send communications using the clinic's identity.
Affected software
OpenEMR
How to mitigate CVE-2026-126447
Install security update from vendor's website.
OpenEMR - update to 8.5.0