Best Kubernetes Secrets Management Tools in 2026: Vault, ESO, Sealed Secrets & More
Every Kubernetes cluster ships with a built-in Secret object. It looks like security. It feels like security. It isn’t security. A Kubernetes Secret is, by default, just a base64-encoded string stored in etcd — readable by anyone with cluster access and trivially decodable with a one-liner: echo "c2VjcmV0" | base64 -d. Unless you’ve explicitly enabled encryption at rest (and most teams haven’t), your database passwords, API tokens, and TLS private keys are sitting unencrypted in your cluster’s control plane datastore. Commit a Kubernetes manifest containing a Secret to Git, and that credential lives in your repository’s history forever. ...