Scan a container image for vulnerabilities and gate CI on severity thresholds using Trivy
domain: aquasecurity.github.io/trivy · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Install Trivy via the official install script or package manager
Run `trivy image --exit-code 1 --severity CRITICAL,HIGH <image>:<tag>` to fail the pipeline if CRITICAL or HIGH CVEs are found
Output results in SARIF for GitHub Advanced Security: `trivy image --format sarif --output trivy-results.sarif <image>`
Upload the SARIF file using the `github/codeql-action/upload-sarif` action to surface findings in the Security tab
Review the `TRIVY_IGNOREFILE` (`.trivyignore`) mechanism to suppress known false positives with documented justification
Known gotchas
Trivy's exit code 1 is triggered by the `--exit-code 1` flag combined with findings at or above the specified severity; without `--exit-code 1` the scan always exits 0 regardless of findings
OS package vulnerabilities are only detected when the image contains package manager metadata; distroless images may show fewer findings not because they are safer but because Trivy has less to scan
Trivy's vulnerability database is updated daily; pinning the Trivy version in CI without also updating the DB (`trivy image --download-db-only`) can result in stale detection data
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