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CVE-2026-66362— NGF vulnerability

Quick assessment

Affected
F5 NGINX Gateway Fabric
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 NGINX Gateway Fabric是美国F5公司的一个面向Kubernetes环境的应用流量网关。 F5 NGINX Gateway Fabric 2.5.0至2.6.8之前版本存在输入验证错误漏洞，该漏洞源于配置生成器将用户提供的Authentication Filter字段直接渲染到NGINX配置模板而未进行清理或转义，可能导致经身份验证的攻击者注入任意NGINX配置指令。

CVSS 8.1 · High EPSS 0.57% · P46

Possible ATT&CK Techniques 1 AI

T1195 · Supply Chain Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
F5 NGINX Gateway Fabric 2.5.0< 2.6.8 affected
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I. Basic Information for CVE-2026-66362

Vulnerability Information
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Vulnerability Title
NGF vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Description: 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 Authentication Filter Custom Resource Definition clientID or cookieName fields, or in the clientSecret field of a Secret referenced by an Authentication Filter, are rendered directly into NGINX configuration templates without sanitization or escaping. Impact: An authenticated attacker with permission to create or modify these resources may craft values that inject arbitrary NGINX configuration directives. This is a control plane issue; there is no data plane exposure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
等价特殊元素的转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
F5 NGINX Gateway Fabric 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 NGINX Gateway Fabric是美国F5公司的一个面向Kubernetes环境的应用流量网关。 F5 NGINX Gateway Fabric 2.5.0至2.6.8之前版本存在输入验证错误漏洞，该漏洞源于配置生成器将用户提供的Authentication Filter字段直接渲染到NGINX配置模板而未进行清理或转义，可能导致经身份验证的攻击者注入任意NGINX配置指令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX Gateway Fabric 2.5.0 ~ 2.6.8 -

II. Public POCs for CVE-2026-66362

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III. Intelligence Information for CVE-2026-66362

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Vendor Pages for CVE-2026-66362 (1)

Same Patch Batch · F5 · 2026-09-02 · 7 CVEs total

CVE-2026-66842 8.8 HIGH BIG-IP and BIG-IQ Configuration utility vulnerability
CVE-2026-77180 8.3 HIGH NGINX Ingress Controller vulnerability
CVE-2026-18329 8.2 HIGH NGINX ngx_http_js_module vulnerability
CVE-2026-78689 8.1 HIGH NGINX ngx_http_js_module vulnerablility
CVE-2026-78222 7.5 HIGH NGINX ngx_http_js_module vulnerability
CVE-2026-63020 3.1 LOW BIG-IP Configuration utility vulnerability

IV. Related Vulnerabilities

Same product: NGINX Gateway Fabric
Same vendor: F5
Same weakness: CWE-76

V. Comments for CVE-2026-66362

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