title: Go Vulnerability Database layout: article

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The Go vulnerability database (https://vuln.go.dev) serves Go vulnerability information in the Open Source Vulnerability (OSV) schema.

We recommend using golang.org/x/vuln/client to read data from the Go vulnerability database. You can also browse vulnerabilities in the database at pkg.go.dev/vuln.

Do not rely on the contents of the x/vulndb Git repository. The YAML files in that repository are maintained using an internal format that may change without warning.


We would love for all Go package maintainers to contribute information about public vulnerabilities in their own projects, and update existing information about vulnerabilities in their Go packages.

We aim to make reporting a low friction process, so feel free to send us your suggestions.

Please do not use the forms above to report a vulnerability in the Go standard library or sub-repositories. Instead, follow the process at go.dev/security/policy for vulnerabilities about the Go project.


The vulnerability database is an HTTP server that can respond to GET requests for paths specified below. The requests have no query parameters, and no specific headers are required, so even a site serving from a fixed file system (including a file:// URL) can be a vulnerability database.

By default, govulncheck uses the Go vulnerability database at vuln.go.dev. The command can be configured to contact vulnerability databases using the GOVULNDB environment variable, which accepts a list of a comma-separated list of vulnerability database URLs, with http://, https://, or file:// protocols. Entries from multiple databases are merged.

The vulnerability database supports the endpoints listed below. For each path:

  • $base is the path portion of a Go vulnerability database URL, by default, “https://vuln.go.dev”.
  • $module is a module path
  • $vuln is a Go vulnerability ID (for example, GO-2021-1234)

To avoid various character set issues, the $module element is encoded using module.EncodePath.

The endpoints are:

  • $base/index.json List of module paths in the database mapped to its last modified timestamp (link).

  • $base/$module.json List of vulnerability entries for that module (example).

  • $base/ID/$vuln.json An individual Go vulnerability report (example).


Reports use the Open Source Vulnerability (OSV) schema. The Go vulnerability database assigns the following meanings to the fields:


The id field is a unique identifier for the vulnerability entry. It is a string of the format GO-<YEAR>-<ENTRYID>.


The affected field is a JSON array containing objects that describes the module versions that contain the vulnerability.


The affected[].package field is a JSON object identifying the affected module. The object has two required fields:

  • ecosystem: this will always be “Go”
  • name: this is the Go module path
    • Importable packages in the standard library will have the name stdlib.
    • The go command will have the name toolchain.


The affected[].ecosystem_specific field is a JSON object with additional information about the vulnerability, which is used by package vulncheck.

For now, ecosystem specific will always be an object with a single field, imports.


The affected[].ecosystem_specific.imports field is a JSON array containing the packages and symbols affected by the vulnerability. Each object in the array will have these two fields:

  • path: a string with the import path of the package containing the vulnerability
  • symbols: a string array with the names of the symbols (function or method) that contains the vulnerability
  • goos: a string array with the execution operating system where the symbols appear, if known
  • goarch: a string array with the architecture where the symbols appear, if known

For information on other fields in the schema, refer to the OSV spec.


All vulnerabilities in the Go vulnerability database use the OSV schema described above.

See the links below for examples of different Go vulnerabilities:

  • Go standard library vulnerability (GO-2022-0191): JSON, HTML
  • Go toolchain vulnerability (GO-2022-0189): JSON, HTML
  • Vulnerability in Go module (GO-2020-0015): JSON, HTML

Excluded Reports

The reports in the Go vulnerability database are collected from different sources and curated by the Go Security team. We may come across a vulnerability advisory (for example, a CVE or GHSA) and choose to exclude it for a variety of reasons. In these cases, a minimal report will be created in the x/vulndb repository, under x/vulndb/data/excluded.

Reports may be excluded for these reasons:

  • NOT_GO_CODE: The vulnerability is not in a Go package, but it was marked as a security advisory for the Go ecosystem by another source. This vulnerability cannot affect any Go packages. (For example, a vulnerability in a C++ library.)
  • NOT_IMPORTABLE: The vulnerability occurs in package main, an internal/ package only imported by package main, or some other location which can never be imported by another module.
  • EFFECTIVELY_PRIVATE: While the vulnerability occurs in a Go package which can be imported by another module, the package is not intended for external use and is not likely to ever be imported outside the module in which it is defined.
  • DEPENDENT_VULNERABILITY: This vulnerability is a subset of another vulnerability in the database. For example, if package A contains a vulnerability, package B depends on package A, and there are separate CVE IDs for packages A and B, we might mark the report for B as a dependent vulnerability entirely superseded by the report for A.
  • NOT_A_VULNERABILITY: While a CVE ID or GHSA has been assigned, there is no known vulnerability associated with it.

At the moment, excluded reports are not served via vuln.go.dev API. However, if you have a specific use case and it would be helpful to have access to this information through the API, please let us know.