Magento Lts CVE-2026-25525

Upgrade OpenMage LTS to version 20.17.0 or later immediately, as this version includes the security patch. The vendor-released patch replaces the weak blacklist filter with a more robust path validation mechanism (specific implementation details not disclosed in the advisory). If immediate patching is not feasible, restrict administrative access to the Dataflow module via role-based access control, limiting which user accounts hold administrative privileges; note that this does not eliminate the vulnerability but reduces the attack surface. Additionally, implement filesystem access controls to prevent the web server process from reading sensitive files outside the intended application directories-for example, restricting file permissions so that configuration files and private keys are readable only by specific system accounts, not by the web server user. Monitor Dataflow module activity and alert on path traversal patterns (e.g., requests containing ../, ..././, ....//) in logs. These compensating controls have trade-offs: access restrictions may impact legitimate administrative workflows, and filesystem hardening requires careful permission tuning to avoid breaking application functionality. The primary mitigation remains the vendor patch. Reference the security advisory at https://github.com/OpenMage/magento-lts/security/advisories/GHSA-6vqf-6fhm-7rc6 for additional technical details.