In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument

In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option

zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the utils.c:checkmailpath function

Zsh before version 5.4.2-test-1 is vulnerable to a buffer overflow in the shell autocomplete functionality

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