CVE-2026-94197
An authentication and authorization bypass vulnerability exists in F5 NGINX Kubernetes Ingress Controller (NIC) when configured with the `ExternalAuth` policy or Ingress external authentication. Client-supplied X-Forwarded-Prefix, X-Forwarded-URI, X-Original-URI, and X-Forwarded-Method routing and method headers are forwarded unsanitized into the internal authentication subrequest (handled by the NGINX auth_request directive). As a result, an unauthenticated, remote attacker may spoof request attributes evaluated by the external authentication provider. Impact: This vulnerability may allow remote attackers unauthenticated access to protected paths. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Score
- CVSS 4.0 8.7 High
- Status
- Awaiting Analysis - f5sirt@f5.com
- Published
- 2026-10-14
- Last modified
- 2026-10-15
- Weaknesses
- CWE-290
Affected products
References
- https://my.f5.com/manage/s/article/K000162611
