CVE-2026-39932

OpenEMR 8.2.0 Remote Code Execution via CategoryTree eval() Injection

OpenEMR through 8.2.0 contains a remote code execution vulnerability in the document category tree component (library/classes/Tree.class.php) that allows authenticated administrators to execute arbitrary operating system commands by injecting PHP payloads into the categories database table. Attackers can chain arbitrary SQL execution to alter the id column type to VARCHAR and insert a malicious PHP payload, which is then executed via an unsanitized eval() call whenever any page instantiates CategoryTree, including unauthenticated and low-privilege pages, resulting in command execution as the web server user.

Affected

openemr

CVSS v4.0 VULNCHECK

9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS

2.00% chance of exploitation in the next 30 days, 80th percentile

Published

2026-08-03

Updated

2026-08-14

Proof-of-concept exploits (1)

• https://jivasecurity.com/writeups/openemr-eval-rce-category-tree-cve-2026-39932

Security advisories

• https://www.vulncheck.com/advisories/openemr-remote-code-execution-via-categorytree-eval-…

References

• CVE Record
• NVD entry