GHSA-3278-c88v-xrh4: Kong Ingress Controller for Kubernetes (KIC): Secret-backed plugin configurations leak through non-sensitive diagnostics endpoint

A vulnerability in the Kong Ingress Controller (KIC) allows for the unauthorized exposure of sensitive plugin credentials through the diagnostics interface. Even when configured to redact sensitive information (using --dump-sensitive-config=false), KIC fails to sanitize the Plugins field in diagnostic configuration dumps. This causes secrets referenced via configFrom.secretKeyRef to be resolved and displayed in plaintext.

Because the diagnostics HTTP endpoints require no authentication, any process within the cluster network capable of reaching the KIC pod can exfiltrate sensitive data, including API keys, bearer tokens, and database passwords.