CVE-2026-33431: Roxy-WI Vulnerable to Authenticated Arbitrary File Read via Path Traversal in Config Version Viewer
Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. Prior to version 8.2.6.4, the POST /config/<service>/show API endpoint accepts a configver parameter that is directly appended to a base directory path to construct a local file path, which is subsequently opened and its contents returned to the caller. The existing path traversal guard only inspects the base directory variable (which is never user-controlled) and entirely ignores the user-supplied configver value. An authenticated attacker can supply a configver value containing ../ sequences to escape the intended directory and read arbitrary files accessible to the web application process. Version 8.2.6.4 contains a patch for the issue.
Affected Software
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Event History
Frequently Asked Questions
What is the severity of CVE-2026-33431?
CVE-2026-33431 is classified as a high severity vulnerability due to its potential for authenticated arbitrary file reading.
How do I fix CVE-2026-33431?
To mitigate CVE-2026-33431, upgrade Roxy-WI to version 8.2.6.4 or later.
What systems are affected by CVE-2026-33431?
CVE-2026-33431 affects Roxy-WI versions prior to 8.2.6.4.
What is the exploit vector for CVE-2026-33431?
CVE-2026-33431 can be exploited via the POST /config/<service>/show API endpoint with a manipulated configver parameter.
What are the consequences of CVE-2026-33431 if exploited?
If exploited, CVE-2026-33431 may allow an attacker to read arbitrary files on the server, potentially leading to sensitive information disclosure.