CVE-2026-126419: OpenEMR before 8.5.0 Missing Authorization in E-Sign Form Submission
OpenEMR before 8.5.0 contains a missing authorization vulnerability in the esignformsubmit handler of library/ESign/Form/Controller.php that verifies only the caller's password, not access to the patient, encounter, or form type. Authenticated core users can supply arbitrary formId, formDir, and encounterId values to sign and lock any patient's clinical form, creating unauthorized approval records and blocking normal editing.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated OpenEMR core user can exploit it. The attacker must be able to submit requests to the e-sign form handler and provide their own valid password.
What access is required to affect another patient's form?
The vulnerable handler does not verify authorization for the targeted patient, encounter, or form type. A core user can supply arbitrary formId, formDir, and encounterId values to sign and lock clinical forms belonging to other patients.
Are unauthenticated attackers affected by this vulnerability?
No. Exploitation requires an authenticated core-user account and password verification by the handler.
What is the impact if exploitation succeeds?
An attacker can create unauthorized approval records by signing clinical forms and can lock those forms, preventing normal editing.