Overview
CISA has added CVE-2026-48356 to its Known Exploited Vulnerabilities (KEV) catalog. The flaw is an unrestricted upload of file with dangerous type weakness (CWE-434) in Adobe Commerce and Magento. According to the catalog entry, successful exploitation could result in arbitrary code execution in the context of the current user, potentially giving an attacker elevated access or control over the victim's account or session.
Inclusion in KEV means CISA has evidence of exploitation in the wild.
Technical Details
| Field | Detail |
|---|---|
| CVE | CVE-2026-48356 |
| Weakness | Unrestricted upload of file with dangerous type (CWE-434) |
| Products | Adobe Commerce, Magento |
| Impact | Arbitrary code execution, account or session takeover |
| Status | Listed in CISA KEV on 2026-10-27 |
Upload handlers that do not validate file type, extension, or content let an attacker place executable content, such as a web shell, on the server. Magento storefronts are a frequent target because a foothold on the checkout path allows payment-card skimming.
Detailed CVSS scoring and affected version ranges were not available from the NVD page at time of writing. Consult Adobe's security bulletin for exact fixed versions.
Recommended Actions
- Review Adobe's security bulletin for CVE-2026-48356 and apply the fixed release to every Commerce and Magento instance.
- Federal agencies should meet the remediation deadline CISA sets in the KEV entry; other organizations should treat it as a patch-now item.
- Audit upload directories (
pub/media,var) for unexpected.php,.phtml, or other executable files. - Restrict execution of scripts in media and upload directories at the web-server level.
- Place a WAF in front of admin and upload endpoints, and review access logs for unusual POST requests to upload routes.
- Check checkout pages for unauthorized JavaScript changes, since Magento compromise often ends in card skimming.