Subscribe to Hexnode Blog
Get fresh insights, pro tips, and thought starters–only the best of posts for you.
BackWhat is Container image scanning?
Container image scanning is the process of inspecting a container image for known vulnerabilities, exposed secrets, risky packages, outdated dependencies, and configuration weaknesses before it is deployed.
A container image is a reusable package that includes application code, libraries, runtime components, and operating system files. Because images often move through CI/CD pipelines and registries quickly, scanning helps teams catch inherited risk before it reaches production.
How does it work?
Container image scanning usually runs during image build, registry upload, release approval, or pre-deployment checks. The scanner analyzes image layers, identifies installed packages and dependencies, compares them with vulnerability databases, and reports findings with severity, affected components, and remediation guidance.
Effective scanning also supports policy decisions. Teams can warn developers, fail builds, block promotion to production, or require approval when an image contains critical issues, secrets, unsupported software, or non-compliant base layers.
| Scan area | What it reveals |
| Base image | Finds inherited operating system vulnerabilities, unsupported versions, and risky image sources. |
| Packages and libraries | Detects vulnerable dependencies, outdated components, and packages that need patching or replacement. |
| Build artifacts | Flags embedded secrets, misconfigurations, excessive tools, or files that should not ship in production images. |
Container image scanning vs runtime container security
Container image scanning checks what is inside an image before or during deployment. Runtime container security monitors what the container does after it starts, including process behavior, network activity, file changes, and privilege use.
Organizations need both. Scanning reduces preventable exposure early, while runtime controls detect threats that appear only after the workload is running.
How Hexnode supports container image scanning
Hexnode does not replace dedicated image scanners, registries, or CI/CD security tools. It supports the broader security workflow by strengthening the endpoint and device side of cloud-native security programs.
With Hexnode UEM, teams can improve endpoint visibility, enforce policies, run compliance checks, manage patch workflows, control applications, and take remote actions on managed endpoints. This helps reduce the risk that developer devices, admin workstations, or operational endpoints become weak links in container build, access, or remediation workflows.
When should organizations use it?
Organizations should use image scanning whenever they build, store, approve, or deploy containerized applications. It is especially important for DevSecOps teams, regulated businesses, software vendors, and enterprises using Kubernetes or cloud-native workloads.
It is also useful when teams are standardizing trusted base images, enforcing CI/CD pipeline gates, reducing critical vulnerability backlogs, or proving that production images were reviewed before release.
FAQs
No. It finds known and detectable risks in the image, but it cannot prove the application logic is safe or stop every runtime attack.
Images should be scanned at build time, when pushed to a registry, before deployment, and again when new vulnerability data affects stored images.
Teams usually rebuild the image with patched packages, switch to a safer base image, remove risky artifacts, or hold deployment until the risk is accepted.
