/ 
perl-5.42.0
⭐ Starred 2013 / Test2::Util::ExternalMeta
Security Advisories (4)
CVE-2026-13221 (2026-07-13)

Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk. When such branches are combined into a trie, the delta between the first branch and the shared tail is stored in a 16-bit field. A branch count above 65535 overflows the field, and the trie's match decision table is truncated with no warning or error. A pattern of this shape produces false positive matches (matching strings it should not) and false negative matches (failing to match strings it should). When such a pattern gates an access or filtering decision, the result is wrong.

CVE-2026-4176 (2026-03-29)

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

CVE-2026-57432 (2026-07-13)

Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

CVE-2026-8376 (2026-05-25)

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

NAME

Test2::Util::ExternalMeta - Allow third party tools to safely attach meta-data to your instances.

DESCRIPTION

This package lets you define a clear, and consistent way to allow third party tools to attach meta-data to your instances. If your object consumes this package, and imports its methods, then third party meta-data has a safe place to live.

SYNOPSIS

package My::Object;
use strict;
use warnings;

use Test2::Util::ExternalMeta qw/meta get_meta set_meta delete_meta/;

...

Now to use it:

my $inst = My::Object->new;

$inst->set_meta(foo => 'bar');
my $val = $inst->get_meta('foo');

WHERE IS THE DATA STORED?

This package assumes your instances are blessed hashrefs, it will not work if that is not true. It will store all meta-data in the _meta key on your objects hash. If your object makes use of the _meta key in its underlying hash, then there is a conflict and you cannot use this package.

EXPORTS

$val = $obj->meta($key)
$val = $obj->meta($key, $default)

This will get the value for a specified meta $key. Normally this will return undef when there is no value for the $key, however you can specify a $default value to set when no value is already set.

$val = $obj->get_meta($key)

This will get the value for a specified meta $key. This does not have the $default overhead that meta() does.

$val = $obj->delete_meta($key)

This will remove the value of a specified meta $key. The old $val will be returned.

$obj->set_meta($key, $val)

Set the value of a specified meta $key.

META-KEY RESTRICTIONS

Meta keys must be defined, and must be true when used as a boolean. Keys may not be references. You are free to stringify a reference "$ref" for use as a key, but this package will not stringify it for you.

SOURCE

The source code repository for Test2 can be found at https://github.com/Test-More/test-more/.

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

COPYRIGHT

Copyright Chad Granum <exodist@cpan.org>.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

See https://dev.perl.org/licenses/