This might be proprietary software.

#Vulnerabilities 13
Date Id Summary Products Score Patch Annotated
2018-02-27 CVE-2018-7549 In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p. Ubuntu_linux, Enterprise_linux_desktop, Enterprise_linux_server, Enterprise_linux_workstation, Zsh 7.5
2018-02-27 CVE-2018-7548 In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result. Ubuntu_linux, Zsh 9.8
2007-12-03 CVE-2007-6209 Util/ in zsh 4.3.4 allows local users to overwrite arbitrary files via a symlink attack on temporary files. Zsh N/A