Deprecation note: GitHub is deprecating repository security advisories in private repositories that do not have GitHub Advanced Security (GHAS) enabled. As of 15th February 2024, you will no longer be able to create security advisories in private repositories that do not have GHAS enabled.
This deprecation does not affect published security advisories on public repositories. It also does not affect security advisories on private repositories that have GHAS enabled.
Formerly published advisories in private repositories that do not have GHAS enabled will disappear. If you need to save previously published advisories, you can download them using the GitHub REST API. For more information, see "Repository security advisories" in the REST API documentation.