ZSH » ZSH : Security Vulnerabilities, CVEs, CVSS score >= 8

An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to a program name that is a substring of the intended one.

In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result.

An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.

In zsh before 5.3, an off-by-one error resulted in undersized buffers that were intended to support PATH_MAX characters.

In exec.c in zsh before 5.0.7, there is a buffer overflow for very long fds in the ">& fd" syntax.