CVE-2026-33431: Roxy-WI Vulnerable to Authenticated Arbitrary File Read via Path Traversal in Config Version Viewer

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-20 · updated 2026-06-17
Weakness: CWE-24

Description

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 products

roxy-wi: before 8.2.6.4 — fixed in 8.2.6.4

How to fix

Upgrade to a fixed version: roxy-wi 8.2.6.4. Check the vendor advisory for mitigations.

References

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