Diff two SBOMs across releases to detect component drift using cdxgen or sbom-tool
domain: cyclonedx.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Generate SBOMs for both the baseline and new release in the same format (e.g., CycloneDX JSON) and store them as `sbom-v1.json` and `sbom-v2.json`
Use the `cyclonedx-cli diff` command: `cyclonedx diff --from-file sbom-v1.json --to-file sbom-v2.json --component-versions`
Review the diff output for added, removed, and version-changed components
Cross-reference any newly added or version-changed components against a vulnerability feed (e.g., OSV) to flag regressions
Fail the CI pipeline if the diff introduces a component whose latest known version has a critical CVE
Known gotchas
`cyclonedx-cli` normalises component identity by `name+version+purl`; components that change only their BOM-ref without a version bump will appear unchanged even if the artifact differs
Transitive dependency changes are only visible if both SBOMs were generated with full dependency graph resolution; shallow scans will miss indirect drift
Different SBOM generators may represent the same package under slightly different names or PURL schemes, causing false positives in the diff
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