Latest Fedora delivers 1.42 version. Upstream released 2.12. When you have free time, please upgrade it. The latest version is required for Net-SFTP-0.12.
Net-SSH-Perl 2.x depends on CryptX, which bundles libtomcrypt. Denis Fateyev did show some interest in packaging CryptX but the discussion seemed to tail off around November last year: https://lists.fedoraproject.org/archives/list/perl-devel@lists.fedoraproject.org/message/P5AYS75L4ENHGWP4MMYIFZ3GMPLOWE2N/ Unless someone is willing to package CryptX, Net-SSH-Perl will be stuck at 1.42.
I have now update perl-Net-SSH-Perl to 2.14 in F-28 and Rawhide, albeit hobbled somewhat due to missing ECC support in perl-CryptX (Bug #1545816). F-28 build: https://koji.fedoraproject.org/koji/taskinfo?taskID=25322353 Rawhide build: https://koji.fedoraproject.org/koji/taskinfo?taskID=25322031 I've tested that I can use the eg/pssh script to access some of my machines but the hobbling process may result in some broken behavior that I haven't spotted.