new-vulnerability
An added or changed component has an OSV advisory that the base didn't have (matched by ID and aliases) (default: the advisory's severity)
GitHub Packages · MIT · Node ≥ 18
sbom-diff-sentinel
See exactly what a pull request changes in your software bill of materials, and block the risky changes.
SBOM diff gate: compares CycloneDX 1.4-1.6 / SPDX 2.3 SBOMs or git refs, reports added, removed, upgraded and downgraded components plus license, supplier and hash changes, checks OSV.dev for new vs fixed vulns, and enforces policy. Text/JSON/SARIF/Markdown, GitHub Action.
1 Point the
@mrlouiswrightscope at GitHub Packages in.npmrc@mrlouiswright:registry=https://npm.pkg.github.com2 Install
npm i -D @mrlouiswright/sbom-diff-sentinel
Installing from GitHub Packages needs a token
Published to GitHub Packages, not npmjs.com. GitHub Packages needs a GitHub token with read:packages to install, even for public packages: add //npm.pkg.github.com/:_authToken=${GITHUB_TOKEN} to .npmrc or run npm login --registry=https://npm.pkg.github.com.
$ npx sbom-diff-sentinel base.cdx.json head.spdx.json --offlineSBOM diff: base.cdx.json (8) → head.spdx.json (10) Added (3) + axios@0.21.0 MIT + copyleft-lib@1.0.0 AGPL-3.0-only + dual@2.0.0 MIT OR GPL-3.0-only Removed (1) - left-pad@1.3.0 Upgraded (1) ↑ lodash 4.17.20 → 4.17.21 ... ↳ Review the new license terms 6 change(s): +3 -1 ↑1 ↓1; vulns: 0 new, 0 fixed (skipped (offline)); 3 high, 2 medium, 1 low
Why it exists
sbom-diff-sentinel compares two SBOMs, or your project at a git ref against the working tree. It reports components that were added, removed, upgraded or downgraded, plus license, supplier and hash changes. It checks the added and changed components against OSV.dev and splits the results into new and fixed vulnerabilities, each with a severity. Then it applies a policy: fail on new vulnerabilities at or above a severity, downgrades, new copyleft licenses or oversized changes.
- Reads CycloneDX 1.4–1.6 JSON and SPDX 2.3 JSON - Generates SBOMs from npm, pnpm and yarn lockfiles with license-sentinel - Text, JSON, SARIF and Markdown output (the Markdown suits PR comments and job summaries) - CLI, library and GitHub Action. Node.js 18+, one zero-dependency runtime dependency
Features
copyleft-license
A new dependency, or a license change, brings in copyleft (`--copyleft weak\ (default: high)
hash-changed
Same name and version, different hash: a republished or tampered package, or a different mirror (default: high)
too-many-changes
More component changes than --max-changes (default: high)
osv-error
The OSV lookup failed, so the check can't silently pass. Use --offline to skip it on purpose (default: high)
downgrade
A component moved to a lower version (default: medium (--deny-downgrades raises it to high))
supplier-changed
The supplier or publisher changed (default: medium)
license-changed
Any license change (default: low)
Usage
# project at origin/main vs working tree
npx sbom-diff-sentinel --base origin/main# two SBOM files (formats can be mixed)
npx sbom-diff-sentinel base.cdx.json head.spdx.json# SBOM file vs the current project
npx sbom-diff-sentinel base.cdx.json# write a CycloneDX 1.5 SBOM for the project
npx sbom-diff-sentinel --generate bom.cdx.jsonCI / GitHub Action
on: pull_request
permissions:
contents: read
jobs:
sbom-diff:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
with: { fetch-depth: 0, persist-credentials: false }
- uses: MrLouisWright/sbom-diff-sentinel@v1
id: sbom
with:
fail-on: high # base defaults to origin/<PR base branch>
max-changes: '50'Options & flags
| Flag | Description |
|---|---|
--base <file|ref> | Base SBOM file, or a git ref (e.g. origin/main) to generate it from |
--head <file|dir> | Head SBOM file or project directory (default: --project) |
-C, --project <dir> | Project directory for generation and git refs (default: .) |
--include-dev | Include devDependencies when generating |
--offline | Skip the OSV.dev vulnerability lookup |
--osv-url <url> | OSV API base URL (default: https://api.osv.dev) |
--timeout <ms> | OSV request timeout (default: 15000) |
--fail-on <sev> | critical | high | medium | low | info | none (default: high) |
--copyleft <level> | Flag new copyleft: weak | strong | network | none (default: strong) |
--max-changes <n> | Fail when more than n components change |
--deny-downgrades | Treat downgrades as high severity |
--config <file> | Config file (default: .sbom-diff-sentinel.json or package.json "sbom-diff-sentinel") |
--format <fmt> | Stdout format: text | json | sarif | markdown (default: text) |
--json <file> | Also write a JSON report |
--sarif <file> | Also write a SARIF 2.1.0 report |
--markdown <file> | Also write a Markdown report (PR comment / job summary) |
--no-fixes | Hide fix suggestions --no-color Disable colours |
-q, --quiet | Only print the summary line |
Full reference, config file format and API in the README.
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