Adobe Commerce (Magento) Unrestricted File Upload Vulnerability (CVE-2026-48356) - Critical RCE Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTAll versions of Adobe Commerce and Magento Open Source prior to APSB26-73.
Remote Code Execution (RCE) via malicious file upload, leading to full server compromise and potential data exfiltration.
Apply official Adobe security patches (APSB26-73) immediately and restrict execution permissions in upload directories.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND- Primary Action: Update to the latest patched version as specified in Adobe Advisory APSB26-73. 2. Temporary Mitigation: Disable script execution in the media/upload directories via web server configuration. For Apache (.htaccess):
apache <Directory "/pub/media"> <FilesMatch "\.(php|phtml|phar)$"> Order Allow,Deny Deny from all </FilesMatch> </Directory>- WAF Implementation: Deploy rules to inspect and block multipart/form-data requests containing dangerous file extensions.
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Can't patch production immediately? Deploy managed WAF rules at the edge to intercept RCE, SQLi, and deserialization payloads before they hit your origin server.
Technical Root Cause & Exploitation Mechanics
This vulnerability is classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). It stems from insufficient validation of file extensions and content within the Adobe Commerce upload modules. An attacker can bypass security filters to upload executable scripts (e.g., WebShells) to the server. Notably, this CVE is listed in the CISA KEV catalog, indicating active exploitation in the wild. With an EPSS score of 0.94, the probability of an organization being targeted is extremely high. The 'Scope Change' (S:C) in the CVSS vector suggests that an attack can impact components beyond the application itself, potentially compromising the underlying infrastructure.
Official Vendor Advisories & References
Adobe Commerce is affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could result in arbitrary code execution in the context of the current user, potentially gaining elevated access or control over the victim's account or session. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.
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