Input validation error in nginx-ui - #VU157108
Published: October 22, 2026
Vulnerability identifier: #VU157108
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass configuration directive restrictions and potentially execute arbitrary code.
The vulnerability exists due to improper input validation in internal/config/validation.go when processing configuration editor API requests for files with data extensions. A remote user can write blocked directives into evil.pem through /api/configs and reference that file from a .conf file using include evil.pem; to bypass directive validation and potentially execute arbitrary code when nginx loads the configuration.
Affected software
nginx-ui
Remediation
Install security update from vendor's website.
nginx-ui - update to 2.9.0