Apache Subversion developer here. Andreas Stieger (SUSE, SVN) has written a pre-commit hook script which rejects commits of shattered.io style PDFs https://sv

Apache Subversion developer here. Andreas Stieger (SUSE, SVN) has written a pre-commit hook script which rejects commits of shattered.io style PDFs https://svn.apache.org/viewvc/subversion/trunk/tools/hook-scripts/reject-known-sha1-collisions.sh?view=markup&pathrev=1784336 https://svn.apache.org/viewvc/subversion/trunk/tools/hook-sc... This is the first mitigation available. If you are responsible for an SVN server at risk, please make use of this hook. If somebody could make a similar hook for Windows and post it here or to dev@subversion.apache.org that would be highly appreciated. (edit: switched script link to HTTPS)