diffoscope is vulnerable to arbitrary file write attacks. The vulnerability exists because it does not properly escape the filenames when extracting archive members.
anonscm.debian.org/git/reproducible/diffoscope.git/commit/?id=5fdfe91e71f1c520d902350b18f793b8c69d9118
anonscm.debian.org/git/reproducible/diffoscope.git/commit/?id=632a40828a54b399787c25e7fa243f732aef7e05
bugs.debian.org/854723
bugs.debian.org/cgi-bin/bugreport.cgi?bug=854723
security-tracker.debian.org/tracker/CVE-2017-0359