unset, run this command and check for blank output:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl get deploy kiali -n istio-system -o yaml | grep LOGIN_TOKEN_SIGNING_KEY
</code></pre><p>To determine if your signing key is unset, run this command and check for blank output:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl get cm kiali -n istio-system -o yaml | grep signing_key
</code></pre><h2 id=mitigation>Mitigation</h2><ul><li>For Istio 