fast-check

MITLicense declared in the package manifest.

Property based testing framework for JavaScript (like QuickCheck)

property-based testingend-to-end testingunit testingtestingquickcheckfakerfuzzerfuzz
96

Security score

0 known advisories in v4.9.0

OpenSSF Scorecard 8.7/10

0-100 score computed by this site from verifiable signals only: known OSV.dev advisories affecting this exact version, how recently it was published, and the repository's OpenSSF Scorecard.advisory penalty −0 · staleness penalty −0 · scorecard component 87/100 (30% weight)

Weekly downloads

Downloads across all versions in the last 7 days, from the official npm downloads API (api.npmjs.org).

—

Unpacked size

Size of v4.9.0 on disk after npm install extracts the tarball, as reported by the npm registry.

1.4 MB

Dependencies

Direct runtime dependencies declared by v4.9.0. Transitive dependencies are not counted here — use the lockfile audit for the full tree.

1

Last publish

When v4.9.0 was published to the registry. Long gaps can indicate an unmaintained package.

23 days ago

Security advisories

Vulnerabilities affecting v4.9.0 specifically, from OSV.dev — the open database aggregating the GitHub Advisory Database (GHSA) and CVEs. Links open the full advisory.

No known vulnerabilities affect v4.9.0.

OpenSSF ScorecardJul 20, 2026

OpenSSF Scorecard is an automated audit of the source repository's security practices, run by the Open Source Security Foundation. Each check scores 0-10; hover a check for what it means. Data via deps.dev.
  • MaintainedThe project shows recent activity: commits or issue triage within the last 90 days.Result: 30 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 1010
  • Code-ReviewChanges are reviewed by another maintainer before landing on the main branch.Result: Found 1/7 approved changesets -- score normalized to 11
  • Security-PolicyA SECURITY.md explains how to report vulnerabilities privately.Result: security policy file detected10
  • Dangerous-WorkflowGitHub Actions workflows avoid dangerous patterns such as untrusted code checkout or script injection.Result: no dangerous workflow patterns detected10
  • Token-PermissionsCI workflow tokens follow least privilege — read-only unless a job needs more.Result: GitHub workflow tokens follow principle of least privilege10
  • Binary-ArtifactsNo compiled binaries are committed to the repository — binaries can't be reviewed and may hide malicious code.Result: no binaries found in the repo10
  • CII-Best-PracticesThe project holds an OpenSSF Best Practices badge, a self-certification of security practices.Result: badge detected: Passing5
  • Pinned-DependenciesBuild dependencies are pinned to exact versions or hashes, preventing silent supply-chain swaps.Result: dependency not pinned by hash detected -- score normalized to 99
  • LicenseThe project publishes a license file.Result: license file detected10
  • Signed-ReleasesRelease artifacts are cryptographically signed so consumers can verify their origin.Result: 5 out of the last 5 releases have a total of 5 signed artifacts.8
  • FuzzingThe project is fuzz-tested (e.g. OSS-Fuzz), which finds crashes and memory bugs automatically.Result: project is fuzzed10
  • PackagingReleases are published through an automated CI/CD pipeline rather than by hand.Result: packaging workflow detected10
  • SASTStatic analysis (e.g. CodeQL) runs on pull requests to catch bugs before merge.Result: SAST tool is run on all commits10