Server-Side Request Forgery (SSRF) in OpenEMR - CVE-2026-33321
Published: April 23, 2026
Vulnerability identifier: #VU127335
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33321
CWE-ID: CWE-918
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 perform server-side request forgery.
The vulnerability exists due to server-side request forgery in the Eye Exam PDF creation function when parsing attacker-controlled form answers as unescaped HTML during PDF generation. A remote user can submit a crafted Eye Exam form value and generate a PDF to perform server-side request forgery.
Exploitation requires an account with the Notes - my encounters role.
How to mitigate CVE-2026-33321
Install security update from vendor's website.