Vulnerability in Roxy-Wi
CVE-2026-33431
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Roxy-Wi — versions < 8.2.6.4
Weakness classification (CWE)
References
- github.com/roxy-wi/roxy-wi/security/advisories/GHSA-w3c9-36jf-qrw4 (Exploit, Vendor Advisory)
- github.com/roxy-wi/roxy-wi/commit/d4d100067dd0ee04317f05d3b51be8fcfdc3f802 (Patch)
Frequently asked questions
- What is CVE-2026-33431?
- CVE-2026-33431 is a medium-severity vulnerability in Roxy-Wi, classified under CWE-24. CVSS score: 6.5/10. Published 2026-04-20.
- How severe is CVE-2026-33431?
- Medium severity. CVSS v3 base score is 6.5 out of 10.