dartvulncheck

govulncheck for Dart and Flutter. It checks the packages pinned in pubspec.lock, and the Flutter/Dart SDK you build with, against known vulnerabilities, and fails CI when it finds one. Pure Dart, no Flutter required.

What it adds over the warning from flutter pub get:

flutter pub get warning	dartvulncheck
Printed only; CI still passes	Fails CI through its exit code
pub packages only	Also checks the Flutter/Dart SDK itself
Only after GitHub has reviewed the advisory	Also reads repository advisories as soon as maintainers publish them
Human-readable text only	Machine-readable output with --json

Install

dart pub global activate dartvulncheck 0.2.3

Or from git, at a release tag: dart pub global activate --source git https://github.com/ouchinao/dartvulncheck --git-ref v0.2.3. Either way, name a version rather than the head of main, so that the tool does not change under you between runs.

Usage

dartvulncheck                           # current directory
dartvulncheck app packages/core         # several directories (monorepo)

It reads pubspec.lock, so run dart pub get (or flutter pub get) first.

Option	Meaning	Default
--json	Print JSON	Text
--fail-on <level>	Exit 3 if anything at this severity or above is found (low / moderate / high / critical)	low
--ignore <id>	Advisory ID to ignore (GHSA or CVE). Repeatable. Added to ignored_advisories in pubspec.yaml	None
--strict	Also count advisories whose affected range cannot be read ("unverified")	Not counted
--no-repo-advisories	Skip repository advisories (the early-warning stage)	Skipped automatically without GITHUB_TOKEN
--sdk-version <ver>	Pass the Flutter version by hand	.fvmrc (or .fvm/fvm_config.json) → flutter --version → dart --version
--no-sdk	Do not check the SDK	Checked
--no-transitive	Do not check transitive dependencies	Checked
--verbose	Show how many packages were queried and ignored, and which could not be looked up	Off

Exit codes

Code	Meaning
0	No problems (also when every finding is ignored)
1	Could not check (pubspec.lock missing, network failure, bad arguments)
3	Vulnerabilities found (same value as govulncheck)

"Could not check" never passes as "no problems", and there is no option to make it do so.

Ignoring an advisory

Use pub's own key in pubspec.yaml. The same list also silences the flutter pub get warning.

ignored_advisories:
  - GHSA-xxxx-xxxx-xxxx  # iOS only; this app ships on Android

Ignored findings are counted in the summary line, kept in the JSON output with "ignored": true, and listed by --verbose, so a growing ignore list stays visible. The text report lists them under Ignored.

GitHub Actions

vulncheck:
  runs-on: ubuntu-latest
  steps:
    - uses: actions/checkout@v4
    - uses: subosito/flutter-action@v2
      with:
        channel: stable
    - run: dart pub global activate dartvulncheck 0.2.3
    - run: dart pub global run dartvulncheck app packages/core
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

• No pub get needed: only the committed pubspec.lock is read.
• flutter-action is there so the SDK version can be read from flutter --version. For pure Dart projects, dart-lang/setup-dart is enough.
• GITHUB_TOKEN is needed because the repository-advisory stage makes dozens of requests (60/hour without a token, 1,000/hour with one). The default Actions token is enough.
• Run it on a weekly schedule as well as on pull requests: new advisories appear even when your code does not change.
• This complements Dependabot alerts rather than replacing them. Dependabot opens fix PRs; this tool stops CI and also covers the SDK and unreviewed advisories.

Data sources

Stage	Source	Covers
Primary	GitHub Advisory Database (GET /advisories?ecosystem=pub&affects=…)	Hosted packages
Early warning	Repository security advisories (GET /repos/{owner}/{repo}/security-advisories)	Packages with a GitHub repository, plus dart-lang/sdk and flutter/flutter
Fallback	OSV.dev (POST /v1/querybatch)	Used only when GitHub is unreachable or answers something that is not an advisory list. Not on rate limiting or a rejected token: those need a fix on your side

Base URLs can be overridden with DARTVULNCHECK_GITHUB_API_URL, DARTVULNCHECK_OSV_API_URL and DARTVULNCHECK_PUB_URL (for tests and GitHub Enterprise). Overrides must be https; http is accepted for localhost only, and every override in effect is reported on stderr.

Limitations

• It does not check whether vulnerable code is actually called. pub advisories do not say which functions are affected, so there is nothing to match a call graph against.
• Advisories that only affect some platforms are reported for all platforms. Use ignored_advisories with a comment for the ones that do not apply.
• git and path dependencies cannot be looked up. They are listed with --verbose.
• Repository advisories describe affected versions in free text written by the maintainers. The forms seen so far are read (< 3.13.7 (stable), < 3.14.0-315.3.beta (beta), Prior to 3.11.0, Dart version prior to 2.18.2, Flutter version prior to 3.3.3, >=1.0.0 <= 2.7.1); anything else is reported as "unverified" and not counted unless --strict.
• Withdrawn advisories are dropped, and advisories of dart-lang/sdk that name no package are matched against the SDK only, not against the packages published from that repository (meta, analyzer, …).

Security

doc/threat-model.md is a STRIDE review of the tool itself: what it is trusted with, where untrusted input enters, what is mitigated and what is accepted.

Development

dart pub get
dart analyze
dart test
UPDATE_GOLDENS=1 dart test test/report_test.dart  # after an intended output change

The GitHub API responses under test/fixtures/responses/ are recorded, not written by hand. To refresh them, run the Record API fixtures workflow in Actions and copy the files from its artifact over the existing ones.

A release is a version bump in pubspec.yaml and lib/src/version.dart, an entry in CHANGELOG.md, and, once that is merged, a v<version> tag on main; the Publish to pub.dev workflow publishes that tag.

Code under lib/src/ is split by layer: lockfile/ (input) → sources/ (lookup) → match/ (matching) → report/ (output). check/ runs them in order, cli/ handles arguments and exit codes, and model/ holds the shared types. Only sources/ talks to the network, so every test runs offline.

License

MIT