CVE-2026-66362
NGF vulnerability
- State
- Published
- Severity
- 8.6 High
- Published
- Sep 2, 2026
- Updated
- Sep 3, 2026
- Reserved
- Jul 30, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | f5 |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | f5 |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
NGINX Gateway FabricF5 |
|
References
- https://my.f5.com/manage/s/article/K000162600vendor-advisory
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