PERL5261DELTA(1perl)

📦
version 5.44.0 · 2 versions
, in arch rolling

💖 PERL5261DELTA — bestie, it's the perl v5.26.1 glow-up 💖

okay so real talk, this page lives in the Perl Programmers Reference Guide and it's literally called perl5261delta, and it's here to tell you everything that changed between 5.26.0 and 5.26.1. yeah. a whole tiny little patch release. it ate. 👑

✨ NAME ✨

perl5261delta — what is new for perl v5.26.1 🦋

🌸 DESCRIPTION 🌸

So this doc spills all the tea on the diffs between the 5.26.0 release and the 5.26.1 release. that's it. that's the whole vibe.

If you're jumping in from something older, like 5.24.0, bestie, pause — go read perl5260delta first, because that one covers everything between 5.24.0 and 5.26.0. don't skip steps. 🫶

🔒 Security 🔒

[CVE-2017-12837] Heap buffer overflow in regular expression compiler 💀

Compiling certain regex patterns with the case-insensitive modifier could cause a heap buffer overflow and crash perl. the way that's just rude. it's fixed now. [GH #16021] https://github.com/Perl/perl5/issues/16021

[CVE-2017-12883] Buffer over-read in regular expression parser 😭

For certain types of syntax error in a regex pattern, the error message could either contain the contents of a random, possibly large, chunk of memory — like, actual memory it had no business showing you — or it could crash perl. both of those are bad. both are fixed now. [GH #16025] https://github.com/Perl/perl5/issues/16025

[CVE-2017-12814] $ENV{$key} stack buffer overflow on Windows 🪟

There was a possible stack buffer overflow in the %ENV code on Windows, and the fix is so iconic: they just removed the buffer completely, because it was superfluous anyway. bye. [GH #16051] https://github.com/Perl/perl5/issues/16051

🚫 Incompatible Changes 🚫

There are no changes intentionally incompatible with 5.26.0. If any exist, they're bugs, and we are asking you nicely to submit a report. See "Reporting Bugs" below. 👇

📦 Modules and Pragmata 📦

Updated Modules and Pragmata ⬆️

  • base has been upgraded from version 2.25 to 2.26.

The effects of dotless @INC on this module have been limited by the introduction of a more refined and accurate solution for removing . from @INC while reducing the false positives. lowkey a whole engineering moment. 💅

  • charnames has been upgraded from version 1.44 to 1.45.
  • Module::CoreList has been upgraded from version 5.20170530 to 5.20170922_26.

🖥️ Platform Support 🖥️

Platform-Specific Notes 📝

FreeBSD 🐡

Windows 🪟

🐛 Selected Bug Fixes 🐛

🥹 Acknowledgements 🥹

Perl 5.26.1 represents approximately 4 months of development since Perl 5.26.0 and contains approximately 8,900 lines of changes across 85 files from 23 authors. the way that's a whole group project that actually got finished. obsessed. ✨

Excluding auto-generated files, documentation and release tools, there were approximately 990 lines of changes to 38 .pm, .t, .c and .h files.

Perl continues to flourish into its third decade thanks to a vibrant community of users and developers. The following people are known to have contributed the improvements that became Perl 5.26.1:

Aaron Crane, Andy Dougherty, Aristotle Pagaltzis, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, David Mitchell, E. Choroba, Eric Herman, Father Chrysostomos, Jacques Germishuys, James E Keenan, John SJ Anderson, Karl Williamson, Ken Brown, Lukas Mai, Matthew Horsfall, Ricardo Signes, Sawyer X, Steve Hay, Tony Cook, Yves Orton, Zefram.

The list above is almost certainly incomplete as it is automatically generated from version control history. In particular, it does not include the names of the (very much appreciated) contributors who reported issues to the Perl bug tracker. 🫶

Many of the changes included in this version originated in the CPAN modules included in Perl's core. We're grateful to the entire CPAN community for helping Perl to flourish. 🌈

For a more complete list of all of Perl's historical contributors, please see the AUTHORS file in the Perl source distribution.

🐞 Reporting Bugs 🐞

If you find what you think is a bug, you might check the perl bug database at https://rt.perl.org/. There may also be information at http://www.perl.org/, the Perl Home Page.

If you believe you have an unreported bug, please run the perlbug program included with your release. Be sure to trim your bug down to a tiny but sufficient test case — like, do the work, bestie, it helps so much. Your bug report, along with the output of perl -V, will be sent off to perlbug@perl.org to be analysed by the Perl porting team.

If the bug you are reporting has security implications which make it inappropriate to send to a publicly archived mailing list, then see "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to report the issue. 🔐

🙏 Give Thanks 🙏

If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by running the perlthanks program:

perlthanks

This will send an email to the Perl 5 Porters list with your show of thanks. cute, thoughtful, iconic. 💖

👀 SEE ALSO 👀

The Changes file for an explanation of how to view exhaustive details on what changed.

The INSTALL file for how to build Perl.

The README file for general stuff.

The Artistic and Copying files for copyright information.

okay that's the whole page, you made it to the end, main character energy fr fr 🎀 this was perl v5.44.0, dated 2026-10-17, and yes the manual name is PERL5261DELTA(1perl) — slay, bye bestie 💅✨

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