Security Advisories (3)

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-2026-8376 (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.

https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch

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.

NAME

corelist - a commandline frontend to Module::CoreList

DESCRIPTION

See Module::CoreList for one.

SYNOPSIS

corelist -v
corelist [-a|-d] <ModuleName> | /<ModuleRegex>/ [<ModuleVersion>] ...
corelist [-v <PerlVersion>] [ <ModuleName> | /<ModuleRegex>/ ] ...
corelist [-r <PerlVersion>] ...
corelist --utils [-d] <UtilityName> [<UtilityName>] ...
corelist --utils -v <PerlVersion>
corelist --feature <FeatureName> [<FeatureName>] ...
corelist --diff PerlVersion PerlVersion
corelist --upstream <ModuleName>

OPTIONS

-a

lists all versions of the given module (or the matching modules, in case you used a module regexp) in the perls Module::CoreList knows about.

corelist -a Unicode

Unicode was first released with perl v5.6.2
  v5.6.2     3.0.1
  v5.8.0     3.2.0
  v5.8.1     4.0.0
  v5.8.2     4.0.0
  v5.8.3     4.0.0
  v5.8.4     4.0.1
  v5.8.5     4.0.1
  v5.8.6     4.0.1
  v5.8.7     4.1.0
  v5.8.8     4.1.0
  v5.8.9     5.1.0
  v5.9.0     4.0.0
  v5.9.1     4.0.0
  v5.9.2     4.0.1
  v5.9.3     4.1.0
  v5.9.4     4.1.0
  v5.9.5     5.0.0
  v5.10.0    5.0.0
  v5.10.1    5.1.0
  v5.11.0    5.1.0
  v5.11.1    5.1.0
  v5.11.2    5.1.0
  v5.11.3    5.2.0
  v5.11.4    5.2.0
  v5.11.5    5.2.0
  v5.12.0    5.2.0
  v5.12.1    5.2.0
  v5.12.2    5.2.0
  v5.12.3    5.2.0
  v5.12.4    5.2.0
  v5.13.0    5.2.0
  v5.13.1    5.2.0
  v5.13.2    5.2.0
  v5.13.3    5.2.0
  v5.13.4    5.2.0
  v5.13.5    5.2.0
  v5.13.6    5.2.0
  v5.13.7    6.0.0
  v5.13.8    6.0.0
  v5.13.9    6.0.0
  v5.13.10   6.0.0
  v5.13.11   6.0.0
  v5.14.0    6.0.0
  v5.14.1    6.0.0
  v5.15.0    6.0.0

-d

finds the first perl version where a module has been released by date, and not by version number (as is the default).

--diff

Given two versions of perl, this prints a human-readable table of all module changes between the two. The output format may change in the future, and is meant for humans, not programs. For programs, use the Module::CoreList API.

-? or -help

help! help! help! to see more help, try --man.

-man

all of the help

-v

lists all of the perl release versions we got the CoreList for.

If you pass a version argument (value of $], like 5.00503 or 5.008008), you get a list of all the modules and their respective versions. (If you have the version module, you can also use new-style version numbers, like 5.8.8.)

In module filtering context, it can be used as Perl version filter.

-r

lists all of the perl releases and when they were released

If you pass a perl version you get the release date for that version only.

--utils

lists the first version of perl each named utility program was released with

May be used with -d to modify the first release criteria.

If used with -v <version> then all utilities released with that version of perl are listed, and any utility programs named on the command line are ignored.

--feature, -f

lists the first version bundle of each named feature given

--upstream, -u

Shows if the given module is primarily maintained in perl core or on CPAN and bug tracker URL.

As a special case, if you specify the module name Unicode, you'll get the version number of the Unicode Character Database bundled with the requested perl versions.

EXAMPLES

$ corelist File::Spec

File::Spec was first released with perl 5.005

$ corelist File::Spec 0.83

File::Spec 0.83 was released with perl 5.007003

$ corelist File::Spec 0.89

File::Spec 0.89 was not in CORE (or so I think)

$ corelist File::Spec::Aliens

File::Spec::Aliens  was not in CORE (or so I think)

$ corelist /IPC::Open/

IPC::Open2 was first released with perl 5

IPC::Open3 was first released with perl 5

$ corelist /MANIFEST/i

ExtUtils::Manifest was first released with perl 5.001

$ corelist /Template/

/Template/  has no match in CORE (or so I think)

$ corelist -v 5.8.8 B

B                        1.09_01

$ corelist -v 5.8.8 /^B::/

B::Asmdata               1.01
B::Assembler             0.07
B::Bblock                1.02_01
B::Bytecode              1.01_01
B::C                     1.04_01
B::CC                    1.00_01
B::Concise               0.66
B::Debug                 1.02_01
B::Deparse               0.71
B::Disassembler          1.05
B::Lint                  1.03
B::O                     1.00
B::Showlex               1.02
B::Stackobj              1.00
B::Stash                 1.00
B::Terse                 1.03_01
B::Xref                  1.01

COPYRIGHT

Currently maintained by the perl 5 porters <perl5-porters@perl.org>.

This program is distributed under the same terms as perl itself. See http://perl.org/ or http://cpan.org/ for more info on that.

To install less, copy and paste the appropriate command in to your terminal.

cpanm

cpanm less

CPAN shell

perl -MCPAN -e shell
install less

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	Go to GitHub issues (only if GitHub is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)