https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html says about 0.73:
* Security fix: in bracketed paste mode, the terminal escape sequences that should delimit the pasted data were appearing together on one side of it, making it possible to misidentify pasted data as manual keyboard input.
(* Bug fix (possibly security-related): an SSH-1 server sending a disconnection message could cause an access to freed memory.)
alpha keywords dropped to unstable
all arches done
Maintainer(s), please cleanup.
Security, please vote.
GLSA Vote: No!
Repository is clean, all done!