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Clair

Transparent vulnerability scanning for container images using static analysis

Clair provides automated static analysis of OCI and Docker container images, indexing them via an API to detect known vulnerabilities and give teams clear insight into container security.

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Overview

Overview

Clair is a service that performs static analysis of container images to identify known vulnerabilities. It accepts OCI‑compliant and Docker images, indexes them through a RESTful API, and matches each layer against vulnerability databases. The result is a clear, machine‑readable report that developers and security teams can consume to assess the risk of any image before it runs in production.

Who should use it

The tool is aimed at security engineers, DevOps practitioners, and platform teams that need automated, repeatable scanning as part of CI/CD pipelines or Kubernetes admission controls. Because Clair runs as a standalone service, it can be deployed on‑premises or in any cloud environment, and it integrates easily with existing registries and orchestration platforms. Stable binaries are distributed via the project's releases page, ensuring a reliable production footprint while the main branch remains a development sandbox.

Highlights

Static analysis of OCI and Docker images
API-driven image indexing and vulnerability matching
Transparent reporting of known CVEs
Designed for integration with CI/CD pipelines

Pros

  • Clear, transparent vulnerability results
  • Supports both OCI and Docker image formats
  • API enables automation
  • Active community and frequent releases

Considerations

  • Main branch may be unstable; use releases for production
  • Requires external vulnerability data feeds
  • Setup can be complex for beginners
  • Limited to static analysis, no runtime scanning

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Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.

Fit guide

Great for

  • Security teams needing automated container vulnerability scans
  • DevOps pipelines that require API-driven image assessment
  • Organizations adopting OCI/Docker standards
  • Teams valuing transparent security reporting

Not ideal when

  • Environments that need real-time runtime protection
  • Users seeking a single‑click GUI tool
  • Projects requiring out‑of‑the‑box vulnerability feeds without configuration
  • Teams without capacity to manage a service deployment

How teams use it

CI/CD pipeline integration

Automatically fail builds that contain images with known vulnerabilities

Kubernetes admission control

Block deployment of container images that exceed defined CVE thresholds

Periodic security audit

Generate comprehensive reports of all images stored in a registry

Compliance monitoring

Map container images to regulatory vulnerability requirements and alert on violations

Tech snapshot

Go92%
jq3%
Makefile2%
Shell1%
Dockerfile1%
Smarty1%

Tags

kubernetesocistatic-analysiscontainersgovulnerabilitiesoci-imagedockerclair

Frequently asked questions

What image formats does Clair support?

Clair can analyze OCI and Docker container images.

How is Clair accessed?

Through its RESTful API, you can index images and query for vulnerabilities.

Where can I obtain stable binaries?

Use the releases page; the main branch may be unstable.

What license is Clair released under?

Apache‑2.0.

How can I contribute or get support?

Join the mailing list, IRC channel, or file issues on GitHub.

Project at a glance

Active
Stars
10,903
Watchers
10,903
Forks
1,195
LicenseApache-2.0
Repo age10 years old
Last commit23 hours ago
Primary languageGo

Last synced 2 hours ago