CVE-2026-33027
Prior to version 2.3.4, the nginx-ui configuration improperly handles URL-encoded traversal sequences.
Does this matter?
Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.40% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22, CWE-73
- Affected
- nginxui/nginx ui
- Source
- security-advisories@github.com
References
- https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4Product, Release Notes
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-m8p8-53vf-8357Exploit, Vendor Advisory
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-m8p8-53vf-8357Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.