Security Scorecards

OSS Security Scorecards with golang.

A short motivational video clip to inspire us


  1. Automate analysis and trust decisions on the security posture of open source projects.

  2. Use this data to proactively improve the security posture of the critical projects the world depends on.

Public Data

If you're only interested in seeing the results over time, we run this program nightly and publish the results in
json format.

This data is available on Google Cloud Storage and can be downloaded via the
command-line tool.

$ gsutil ls gs://ossf-scorecards/

The latest results are also always available at

The list of projects that are checked each night is available in the
file in this repository. If you would like us to track more, please feel free to
send a Pull Request with others.


The program only requires one argument to run, the name of the repo:

$ go build
$ ./scorecard
Starting [Active]
Starting [CI-Tests]
Starting [CII-Best-Practices]
Starting [Code-Review]
Starting [Contributors]
Starting [Frozen-Deps]
Starting [Fuzzing]
Starting [Pull-Requests]
Starting [SAST]
Starting [Security-Policy]
Starting [Signed-Releases]
Starting [Signed-Tags]
Finished [Fuzzing]
Finished [CII-Best-Practices]
Finished [Frozen-Deps]
Finished [Security-Policy]
Finished [Contributors]
Finished [Signed-Releases]
Finished [Signed-Tags]
Finished [CI-Tests]
Finished [SAST]
Finished [Code-Review]
Finished [Pull-Requests]
Finished [Active]

Active: Pass 10
CI-Tests: Pass 10
CII-Best-Practices: Pass 10
Code-Review: Pass 10
Contributors: Pass 10
Frozen-Deps: Pass 10
Fuzzing: Pass 10
Pull-Requests: Pass 10
SAST: Fail 0
Security-Policy: Pass 10
Signed-Releases: Fail 10
Signed-Tags: Fail 5


Before running Scorecard, you need to
create a GitHub access token
and set it in environment variable GITHUB_AUTH_TOKEN.
This helps to avoid the GitHub's
api rate limits
with unauthenticated requests.

# For posix platforms, e.g. linux, mac:
export GITHUB_AUTH_TOKEN=<your access token>

# For windows:
set GITHUB_AUTH_TOKEN=<your access token>

As an alternative to personal access tokens, we also support GitHub App Installations
for higher rate-limit quotas.
If you have an installed GitHub App and key file, you can use these three environment
variables, following the commands shown above for your platform.

GITHUB_APP_KEY_PATH=<path to the key file on disk>
GITHUB_APP_ID=<app id>

These can be obtained from the GitHub developer settings page.


The following checks are all run against the target project:

Name Description
Security-MD Does the project contain a security policy?
Contributors Does the project have contributors from at least two different organizations?
Frozen-Deps Does the project declare and freeze dependencies?
Signed-Releases Does the project cryptographically sign releases?
Signed-Tags Does the project cryptographically sign release tags?
CI-Tests Does the project run tests in CI, e.g. GitHub Actions, Prow?
Code-Review Does the project require code review before code is merged?
CII-Best-Practices Does the project have a CII Best Practices Badge?
Pull-Requests Does the project use Pull Requests for all code changes?
Fuzzing Does the project use OSS-Fuzz?
SAST Does the project use static code analysis tools, e.g. CodeQL?
Active Did the project get any commits and releases in last 90 days?

To see detailed information on how each check works, see the check-specific documentation page.

If you'd like to add a check, make sure it is something that meets the following criteria:

  • automate-able
  • objective
  • actionable

and then create a new GitHub Issue.


Each check returns a Pass / Fail decision, as well as a confidence score between 0 and 10.
A confidence of 0 should indicate the check was unable to achieve any real signal, and the result
should be ignored.
A confidence of 10 indicates the check is completely sure of the result.

Many of the checks are based on heuristics, contributions are welcome to improve the detection!

Running specific checks

To use a particular check(s), add the --checks argument with a list of check

For example, --checks=CI-Tests,Code-Review.

Formatting Results

There are three formats currently: default, json, and csv. Others may be added in the future.

These may be specified with the --format flag.


  • The scorecard must only be composed of automate-able, objective data. For example, a project having 10 contributors doesn’t necessarily mean it’s more secure than a project with say 50 contributors. But, having two maintainers might be preferable to only having one - the larger bus factor and ability to provide code reviews is objectively better.
  • The scorecard criteria can be as specific as possible and not limited general recommendations. For example, for Go, we can recommend/require specific linters and analyzers to be run on the codebase.
  • The scorecard can be populated for any open source project without any work or interaction from maintainers.
  • Maintainers must be provided with a mechanism to correct any automated scorecard findings they feel were made in error, provide "hints" for anything we can't detect automatically, and even dispute the applicability of a given scorecard finding for that repository.
  • Any criteria in the scorecard must be actionable. It should be possible, with help, for any project to "check all the boxes".
  • Any solution to compile a scorecard should be usable by the greater open source community to monitor upstream security.