Current version in our repositories

1.1.2

https://code.chakralinux.org/chakra/packages/desktop/blob/master/irssi/PKGBUILD

New version available upstream

1.2.1 (or 1.1.3 for just the security fix)

https://irssi.org/2019/06/29/irssi-1.2.1-1.1.3-1.0.8-released/