Mercurial before 3.7.3 allows remote attackers to execute arbitrary code via a crafted name when converting a Git repository.
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.3_.282016-3-29.29
https://selenic.com/repo/hg-stable/rev/cdda7b96afff
https://selenic.com/repo/hg-stable/rev/b732e7f2aba4
https://selenic.com/repo/hg-stable/rev/ae279d4a19e9
https://selenic.com/repo/hg-stable/rev/80cac1de6aea
https://selenic.com/repo/hg-stable/rev/197eed39e3d5
https://security.gentoo.org/glsa/201612-19
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.debian.org/security/2016/dsa-3542
http://rhn.redhat.com/errata/RHSA-2016-0706.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00043.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00016.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181542.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181505.html