I think it is a 2-step process.
1) use cvss2svn to migrate from CVS to a temp SVN repository. - http://cvs2svn.tigris.org/cvs2svn.html
2) Use SVN importer for stash - https://marketplace.atlassian.com/plugins/org.tmatesoft.subgit.stash-svn-importer
This is the approach I took except for #2 I used 'git svn' to import the SVN repo and put Stash on top of that. Why didn't I use the SVN importer for stash? Mostly because I didn't know about it. :-)
Some useful reading on using 'git svn':
Badges are a great way to show off community activity, whether you’re a newbie or a Champion.Learn more
After spinning my wheels trying to get organized enough to write a book for National Novel Writing Month (NaNoWriMo) I took my affinity for Atlassian products from my work life and decided to tr...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs