Description: When NGINX Plus is configured as the data plane for NGINX Gateway...
High8.6CVE-2026-66362 · Published Sep 2, 2026 · updated Sep 3, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| NGINX Gateway Fabric Product | >= 2.5.0, < 2.6.8 | 2.6.8 |
Details and references
- CVSS 4.0
- 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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-76
More F5 advisories
All F5| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 2 | F5 NGINX JavaScript: out-of-bounds write | Critical9.2 | 1.0.1 |
| Sep 2 | When NGINX Ingress Controller is configured with Ingress annotations | High8.7 | 5.6.0+1 more |
| Sep 2 | F5 NGINX JavaScript: denial of service | High8.7 | 1.0.1 |
| Sep 2 | F5 BIG-IP: attacker could spoof error messages Impact: An attacker may | Low2.3 | 21.1.0.1+3 more |
| Sep 2 | F5 BIG-IP: privilege escalation | High8.7 | 21.1.0.1+4 more |
| Sep 2 | Description NGINX JavaScript | High8.8 | 1.0.1 |