/ 
perl-5.42.2
⭐ Starred 2013 / Test2::Tools::Exports
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-2026-15534 (2026-08-09)

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject length plus one times the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14, leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads go past the end of the allocation, and on failure CACHEsayNO sets a bit past it. A caller that matches an attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt heap memory.

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::Tools::Exports - Tools for validating exporters.

DESCRIPTION

These are tools for checking that symbols have been imported into your namespace.

SYNOPSIS

use Test2::Tools::Exports

use Data::Dumper;
imported_ok qw/Dumper/;
not_imported_ok qw/dumper/;

EXPORTS

All subs are exported by default.

imported_ok(@SYMBOLS)

Check that the specified symbols exist in the current package. This will not find inherited subs. This will only find symbols in the current package's symbol table. This WILL NOT confirm that the symbols were defined outside of the package itself.

imported_ok( '$scalar', '@array', '%hash', '&sub', 'also_a_sub' );

@SYMBOLS can contain any number of symbols. Each item in the array must be a string. The string should be the name of a symbol. If a sigil is present then it will search for that specified type, if no sigil is specified it will be used as a sub name.

not_imported_ok(@SYMBOLS)

Check that the specified symbols do not exist in the current package. This will not find inherited subs. This will only look at symbols in the current package's symbol table.

not_imported_ok( '$scalar', '@array', '%hash', '&sub', 'also_a_sub' );

@SYMBOLS can contain any number of symbols. Each item in the array must be a string. The string should be the name of a symbol. If a sigil is present, then it will search for that specified type. If no sigil is specified, it will be used as a sub name.

CAVEATS

Before Perl 5.10, it is very difficult to distinguish between a package scalar that is undeclared vs declared and undefined. Currently imported_ok and not_imported_ok cannot see package scalars declared using our $var unless the variable has been assigned a defined value.

This will pass on recent perls, but fail on perls older than 5.10:

use Test2::Tools::Exports;

our $foo;

# Fails on perl onlder than 5.10
imported_ok(qw/$foo/);

If $foo is imported from another module, or imported using use vars qw/$foo/; then it will work on all supported perl versions.

use Test2::Tools::Exports;

use vars qw/$foo/;
use Some::Module qw/$bar/;

# Always works
imported_ok(qw/$foo $bar/);

SOURCE

The source code repository for Test2-Suite 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 http://dev.perl.org/licenses/