High [CVE-2026-66362] 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
This high-severity F5 advisory covers CVE-2026-66362 affecting NGINX Gateway Fabric.
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Summary
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.
- NGINX Gateway Fabric 2.5.0 before 2.6.8
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 2.6.8. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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