URL Traversal Vulnerability in Nginx UI Affects Configuration Management

CVE-2026-33027

What is CVE-2026-33027?

The Nginx UI, an interface for managing the Nginx web server, has a vulnerability that allows authenticated users to exploit improperly handled URL-encoded traversal sequences. This can lead to unintended access to the base configuration directory (/etc/nginx), enabling users to execute destructive operations such as removing essential configuration files. This can result in service disruption and operational issues. The vulnerability was addressed in version 2.3.4, highlighting the importance of keeping server management tools updated to protect against potential attacks.

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