Missing Authorization in OpenEMR - CVE-2026-34053
Published: April 30, 2026
Vulnerability identifier: #VU128542
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-34053
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenEMR
Affected software:
OpenEMR
OpenEMR
Detailed vulnerability description
The vulnerability allows a remote user to delete procedure orders, answers, and specimens for arbitrary patients.
The vulnerability exists due to improper access control in interface/forms/procedure_order/handle_deletions.php when handling crafted POST requests to the AJAX deletion endpoint. A remote user can send a specially crafted request with enumerated order_id, order_seq, or specimen_id values to delete procedure orders, answers, and specimens for arbitrary patients.
The endpoint requires an authenticated session and a valid CSRF token, but the identifiers are sequential integers that are trivial to enumerate.
How to mitigate CVE-2026-34053
Install security update from vendor's website.