This was fixed by updating PuTTY/plink to version 0.81.
Can you mention which release notes you are looking at?
I think the "What's New in TortoiseSVN 1.14" page is seldom updated for patch-releases.
The homepage news item "TortoiseSVN 1.14.7 released" does mention the security fix.
The ChangeLog.txt doesn't mention the updated PuTTY Plink, but it frequently omit this completely.
Kind regards,
Daniel