Auth bypass in Roxy-Wi
CVE-2026-33432
Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. In versions up to and including 8.2.8.2, when LDAP authentication is enabled, Roxy-WI constructs an LDAP search filter by directly concatenating the user-supplied login username into the filter string without escaping LDAP special characters. An unauthenticated attacker can inject LDAP filter metacharacters into the username field to manipulate the search query, cause the directory to return an unintended user entry, and bypass authentication entirely — gaining access to the application without knowing any valid password. As of time of publication, no known patches are available.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% 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: 0.006 · change: +0.001
Affected products
- Roxy-Wi — versions <= 8.2.8.2
Weakness classification (CWE)
References
- github.com/roxy-wi/roxy-wi/security/advisories/GHSA-hv3x-4w38-r92m (Exploit, Vendor Advisory)
- github.com/roxy-wi/roxy-wi/blob/v8.2.8.2/app/modules/roxywi/auth.py (Product)
Frequently asked questions
- What is CVE-2026-33432?
- CVE-2026-33432 is a critical-severity vulnerability in Roxy-Wi, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-04-20.
- How severe is CVE-2026-33432?
- Critical severity. CVSS v3 base score is 9.1 out of 10.