XML External Entity injection in OpenEMR - CVE-2026-33913
Published: April 23, 2026
Vulnerability identifier: #VU127353
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33913
CWE-ID: CWE-611
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 disclose sensitive information.
The vulnerability exists due to improper restriction of xml external entity reference in the CCDA import functionality in src/Services/Cda/XmlExtended.php when parsing uploaded CCDA XML with XInclude processing enabled. A remote user can upload a crafted CCDA document containing XInclude directives to disclose sensitive information.
Exploitation requires access to the Carecoordination module, and only instances with that module enabled are vulnerable.
How to mitigate CVE-2026-33913
Install security update from vendor's website.