docker scout and docker scan Command Reference

By Daniel Zoghalchali·Latchkey

Scan images for known vulnerabilities.

docker scout is the current image vulnerability tool; docker scan (Snyk-based) is deprecated and removed from recent Docker versions. In CI, scout analyzes an image against CVE databases and can fail the build when severe vulnerabilities are found.

Common subcommands and flags

docker scout cves IMAGE - list CVEs affecting the image
docker scout quickview IMAGE - summary of vulnerabilities by severity
docker scout compare --to BASE IMAGE - diff vulnerabilities against a baseline
--exit-code - return non-zero when issues are found
--only-severity - limit to severities, e.g. critical,high

Example

shell

docker scout cves --only-severity critical,high --exit-code myorg/app:${{ github.sha }}

In CI

Run docker scout cves with --exit-code and --only-severity critical,high as a gate that fails the pipeline on serious CVEs. Prefer scout over the legacy docker scan, which is no longer bundled with Docker. Use scout compare to block PRs that add vulnerabilities relative to the base branch.

Key takeaways

docker scout replaces the deprecated, removed docker scan.
--exit-code turns scout into a hard CI gate on vulnerabilities.
scout compare flags newly introduced CVEs versus a baseline image.

Frequently asked questions

docker scout and docker scan Command Reference?

In CI?