He already did. He provided a link. Go there and it has a list of security with links with how to address them. Here's a short snippet:
Originally Posted by endman
He also went on to explain that you only need to rebuild your whole system if you go with -stable.
Apply patch using:
signify -Vep /etc/signify/openbsd-55-base.pub -x 005_openssl.patch.sig \
-m - | (cd /usr/src && patch -p0)
Then build and install libssl
Try actually reading the post next time. This particular post was rather short too so there's really no excuse.