CVE-2026-46518
OpenEMR: Stored XSS in prescription CSS/HTML print view via patient demographics
Description
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.1, a stored cross-site scripting vulnerability in the prescription CSS/HTML multi-print feature allows a patient portal user to execute arbitrary JavaScript in a clinician's browser session. Patient demographic fields (name, address) are rendered without output encoding in multiprintcss_header(), and portal patients can write attacker-controlled HTML directly into patient_data by calling the PUT api/patient/:num endpoint, which bypasses the intended audit review workflow. Because the XSS fires in the clinician's authenticated session on the main OpenEMR interface, the attacker can access CSRF tokens, session data, and perform actions as the clinician — crossing the patient-to-clinician trust boundary. This issue has been patched in version 8.0.0.1.
INFO
Published Date :
June 10, 2026, 12:16 a.m.
Last Modified :
June 11, 2026, 6:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update OpenEMR to version 8.0.0.1 or newer.
- Ensure output encoding is applied to all patient demographic fields.
- Validate input for the PUT api/patient/:num endpoint.
- Review audit logs for suspicious activity.
Public PoC/Exploit Available at Github
CVE-2026-46518 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46518.
| URL | Resource |
|---|---|
| https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf | Exploit Vendor Advisory |
| https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46518 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46518
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Aisle CVEs
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46518 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46518 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:* versions up to (excluding) 8.0.0.1 Added Reference Type CISA-ADP: https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 10, 2026
Action Type Old Value New Value Added Reference https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf -
New CVE Received by [email protected]
Jun. 10, 2026
Action Type Old Value New Value Added Description OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.1, a stored cross-site scripting vulnerability in the prescription CSS/HTML multi-print feature allows a patient portal user to execute arbitrary JavaScript in a clinician's browser session. Patient demographic fields (name, address) are rendered without output encoding in multiprintcss_header(), and portal patients can write attacker-controlled HTML directly into patient_data by calling the PUT api/patient/:num endpoint, which bypasses the intended audit review workflow. Because the XSS fires in the clinician's authenticated session on the main OpenEMR interface, the attacker can access CSRF tokens, session data, and perform actions as the clinician — crossing the patient-to-clinician trust boundary. This issue has been patched in version 8.0.0.1. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N Added CWE CWE-79 Added CWE CWE-862 Added Reference https://github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf