Modern 5G networks are increasingly deployed in cloud-native environments, where Network Functions are containerized and orchestrated as Kubernetes Pods, using Deployments or StatefulSets. In these architectures, service meshes like Istio are commonly used to manage the complex interactions between microservices. This thesis addresses the challenge of capturing plain-text messages within cloud-native 5G environments, specifically focusing on the control plane traffic based on HTTP/2 protocol, exchanged between these Network Functions. The primary objective of this research is to develop and evaluate methods for tapping plain traffic in a Kubernetes-orchestrated 5G environment that uses a sidecar-based service mesh, in which the messages are encrypted.