CVE-2026-66362

HighCVSS 8.1/10Last modified Sep 3, 2026

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-76

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
F5	NGINX Gateway Fabric	>= 2.5.0, < 2.6.8

References

https://my.f5.com/manage/s/article/K000162600

Timeline

Published: Sep 2, 2026
Last modified: Sep 3, 2026
NVD status: Awaiting Analysis

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