The 2.15 series release notes contain important changes in this release series.

Security Fixes

• In certain cases, when a user would try to authorize their account through the OAuth web application flow, not all of the requested scopes would appear on the authorization page.

Bug Fixes

• When using the quote reply feature ~strikethrough~ text was not preserved and suggested changes were duplicated.
• Using ghe-migrator, an import would fail if an attachment file was missing from the export archive.

Known Issues

• On a freshly set up GitHub Enterprise without any users, an attacker could create the first admin user.
• Custom firewall rules aren't maintained during an upgrade.
• 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.
• Resque workers may not be cleaned up following a configuration run leading to a growing number of stale workers which in turn could lead to high memory consumption. (updated 2019-05-08)

Thanks!

The GitHub Team