A misconfigured Helm Chart can turn a strong Kubernetes deployment into an unlocked building. Security is not a nice-to-have when you’re deploying with Helm. It’s the baseline. Too many teams ship charts without reviewing them closely, trusting defaults, or skipping audits. That’s how exposed dashboards, permissive roles, and hardcoded secrets make it into production.
A security review for a Helm Chart starts before you run helm install. Look inside the templates. Review the values.yaml file line by line. Search for cleartext secrets, weak default passwords, and unnecessary ports. Scan Role-Based Access Control (RBAC) sections for overly broad cluster roles. Confirm resource limits exist for every container. Minimal privileges reduce blast radius.
Validate the provenance of the chart. If you’re pulling from a public repository, verify the signatures and inspect for tampering. Unverified sources are an easy way for malicious code to slip past a code review. Run automated scanners to catch known vulnerabilities, insecure images, or dangerous capabilities like privileged: true or writable host paths.
Pay close attention to container images in the chart. Use images from trusted registries. Lock them to specific digests instead of mutable tags like latest, which can change without notice and pull in unknown changes. Combine this with an image vulnerability scan before deploying.