/ 
ack-1.54
/ App::Ack
Security Advisories (3)
CVE-2026-49145 (2026-07-08)

App::Ack versions through 3.10.0 for Perl read arbitrary files via --files-from in a project .ackrc. ack searches up the directory hierarchy from the current directory for a project .ackrc and loads its options. The project-source option blocklist in App::Ack::ConfigLoader does not include --files-from, so a project .ackrc can set it to a path whose listed files ack then reads and searches. Version 3.10.0 added --follow to the blocklist; --files-from remains accepted. A project .ackrc committed to an untrusted repository can make ack read files outside the project and print their matching lines.

CVE-2026-49146 (2026-07-08)

App::Ack versions before 3.10.0 for Perl allow memory exhaustion via an unbounded context value in a project .ackrc. ack searches up the directory hierarchy from the current directory for a project .ackrc and loads its options. The -B and -C context options accepted any positive integer, and ack sized the before-context buffer to that value, so a project .ackrc setting --before-context=100000000 made ack allocate a buffer of 100 million elements. A project .ackrc committed to an untrusted repository can abort ack with an out-of-memory condition.

CVE-2026-49147 (2026-07-08)

App::Ack versions through 3.10.0 for Perl print unsanitised terminal escape sequences from filenames in several output modes. When ack prints a filename whose basename contains terminal control bytes such as ANSI escape sequences, those bytes reach the terminal unchanged. Version 3.10.0 added a _safe_filename helper that sanitises the filenames printed by -f, -g, the colored match heading, and per-match lines, but the --show-types, -l/-L, and -c paths still emit the raw filename. A file whose name embeds cursor-movement or color escapes can overwrite or recolor earlier terminal output, or be passed unchanged to a downstream consumer.

NAME

App::Ack - A container for functions for the ack program

VERSION

Version 1.54

SYNOPSIS

If you want to know about the ack program

No user-serviceable parts inside. ack is all that should use this.

FUNCTIONS

skipdir_filter

Standard filter to pass as a File::Next descend_filter. It returns true if the directory is any of the ones we know we want to skip.

filetypes( $filename )

Returns a list of types that $filename could be. For example, a file foo.pod could be "perl" or "parrot".

The filetype will be undef if we can't determine it. This could be if the file doesn't exist, or it can't be read.

It will be '-ignore' if it's something that ack should always ignore, even under -a.

should_ignore( $filename )

Returns true if the filename is one that we should ignore regardless of filetype, like a coredump or a backup file.

options_sanity_check( %opts )

Checks for sane command-line options. For example, -l doesn't make sense with -C.

filetypes_supported()

Returns a list of all the types that we can detect.

show_help()

Dumps the help page to the user.

show_help_types()

Display the filetypes help subpage.

version_statement( $copyright )

Prints the version information for ack.