Input validation error in magento-lts - CVE-2026-40488
Published: April 20, 2026
Vulnerability identifier: #VU126484
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-40488
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OPENMAGE
Affected software:
magento-lts
magento-lts
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper input validation in the product custom option file upload handler when processing uploaded files. A remote attacker can upload a specially crafted file with an alternative executable extension to execute arbitrary code.
Exploitation is possible when uploaded files are stored in a publicly accessible directory and the server configuration permits execution of uploaded script files in that location.
How to mitigate CVE-2026-40488
Install security update from vendor's website.