The 2.17 series release notes contain important changes in this release series.

Security Fixes

• HIGH: The repository import functionality was vulnerable to a command injection issue when importing Mercurial repositories.
• Packages have been updated to the latest security versions.

Bug Fixes

• A 500 Internal Server Error could occur when creating a new organization.
• GitHub Apps were unable to modify GitHub Team memberships via the API.

Known Issues

• On a freshly set up GitHub Enterprise Server without any users, an attacker could create the first admin user.
• Custom firewall rules aren't maintained during an upgrade.
• Subversion (SVN) checkout may timeout while the repository data cache is being built. In most cases, subsequent svn checkout attempts will succeed.
• Git LFS tracked files uploaded through the web interface are incorrectly added directly to the repository.
• Issues cannot be closed if they contain a permalink to a blob in the same repository where the file path is longer than 255 characters.
• Lines in gists are not selectable.
• When "Users can search GitHub.com" is enabled with GitHub Connect, issues in private and internal repositories are not included in GitHub.com search results.

Thanks!

The GitHub Team