CVE-2026-11311

When NGINX Plus is configured as the data plane for NGINX Gateway Fabric, an injection vulnerability exists in the NGINX configuration generator component of NGINX Gateway Fabric. User-supplied string values from the NginxProxy Custom Resource Definition serverTokens field and the AuthenticationFilter Custom Resource Definition extraAuthArgs field are rendered directly into NGINX configuration templates without sanitization or escaping. An authenticated attacker with permission to create or modify these Custom Resource Definitions may craft values that inject arbitrary NGINX configuration directives. This is a control plane issue; there is no data plane exposure from the vulnerability trigger itself. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://my.f5.com/manage/s/article/K000161611	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*

History

02 Jul 2026, 20:01

Type	Values Removed	Values Added
CPE		cpe:2.3:a:f5:nginx_gateway_fabric::::::::
CWE		CWE-74
References	~~() https://my.f5.com/manage/s/article/K000161611 -~~	() https://my.f5.com/manage/s/article/K000161611 - Vendor Advisory
First Time		F5 nginx Gateway Fabric F5

17 Jun 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-17 15:16

Updated : 2026-07-02 20:01

NVD link : CVE-2026-11311

Mitre link : CVE-2026-11311

CVE.ORG link : CVE-2026-11311

JSON object : View

Products Affected

f5

nginx_gateway_fabric

CWE

CWE-76

Improper Neutralization of Equivalent Special Elements

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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