Improper Neutralization of Equivalent Special Elements in NGINX Gateway Fabric - CVE-2026-50107
Published: June 18, 2026
Vulnerability identifier: #VU134860
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-50107
CWE-ID: CWE-76
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: F5 Networks
Affected software:
NGINX Gateway Fabric
NGINX Gateway Fabric
Detailed vulnerability description
The vulnerability allows a remote user to inject arbitrary NGINX configuration directives.
The vulnerability exists due to improper neutralization of equivalent special elements in the NGINX configuration generator component when rendering user-supplied NginxProxy CRD access log format values into NGINX configuration templates. A remote user can supply crafted CRD values to inject arbitrary NGINX configuration directives.
This is a control plane issue only; there is no data plane exposure from the vulnerability trigger itself.
How to mitigate CVE-2026-50107
Install security update from vendor's website.