Critical Zero-Day 'StyleSmuggler' Vulnerability Exploited in Adobe Commerce and Magento
A zero-day vulnerability dubbed StyleSmuggler is being actively exploited in Magento Open Source and Adobe Commerce to achieve unauthenticated remote code execution and install backdoors on e-commerce servers. The flaw allows attackers to inject malicious PHP code into files generated by the platform and then force the template system to process it, with the attack chain triggered during the generation of default transaction failure emails. Exploitation has been observed since September 4 and works even if the email is not successfully sent. Researchers have reproduced the attack on clean installations of versions 2.4.7, 2.4.8, and 2.4.9, as well as on a fully patched Magento 2.4.6-p15 system. After compromise, a Rust-based implant is deployed outside the store directory, masquerading as the process [kworker/u:8:0] and maintained via a cron job that restarts it every five minutes. As of September 6, Adobe had not released a CVE, official patch, or specific workaround, though the next scheduled security update is set for September 8.
BoletimSecSep 8, 2026Translated from Portuguese