Path Traversal in 0xjacky Nginx-Ui
CVE-2026-33027
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui configuration improperly handles URL-encoded traversal sequences. When specially crafted paths are supplied, the backend resolves them to the base Nginx configuration directory and executes the operation on the base directory (/etc/nginx). In particular, this allows an authenticated user to remove the entire /etc/nginx directory, resulting in a partial Denial of Service. This issue has been patched in version 2.3.4.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (32.4th percentile) — read the EPSS interpretation.
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:N/I:N/A:H.
Affected products
- 0xjacky Nginx-ui — versions < 2.3.4
- Nginxui Nginx_ui
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33027?
- CVE-2026-33027 is a medium-severity vulnerability in 0xjacky Nginx-Ui, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-03-30.
- How severe is CVE-2026-33027?
- Medium severity. CVSS v3 base score is 6.5 out of 10.