PERL5363DELTA(1)

📦
version 5.42.3 · 17 versions
, in fedora 43, fedora 44

💖 perl5363delta — what's new for perl v5.36.3 💖

okay bestie, welcome to the PERL5363DELTA page, which lives in the Perl Programmers Reference Guide ✨ yes it's a whole thing, and yes it's about to be your new fave read, no cap.

✨ NAME ✨

perl5363delta — literally just: what is new for perl v5.36.3 🎀

🌸 DESCRIPTION 🌸

This doc spills the tea on the differences between the 5.36.1 release and the 5.36.3 release. 🫶

not me having to say this but: this document ignores Perl 5.36.2, which was a broken release that existed for like a couple of days only 💀 we do not speak of her.

If you're upgrading from an earlier release like 5.36.0, first go read perl5361delta, which covers the differences between 5.36.0 and 5.36.1. do it in order bestie, it's a whole journey 🌈

🔒 Security 🔒

This release fixes the following security issues. and when i say fixes i mean it ate, periodt.

👑 CVE-2023-47038 — Write past buffer end via illegal user-defined Unicode property 👑

This vulnerability was reported directly to the Perl security team by Nathan Mills the.true.nathan.mills@gmail.com. (iconic of him honestly, that's a real email right there, keep it exact 💅)

A crafted regular expression, when compiled by perl 5.30.0 through 5.38.0, can cause a one-byte attacker controlled buffer overflow in a heap allocated buffer. 😭 that's a yikes from me.

🪟 CVE-2023-47039 — Perl for Windows binary hijacking vulnerability 🪟

This vulnerability was reported to the Intel Product Security Incident Response Team (PSIRT) by GitHub user ycdxsb at <https://github.com/ycdxsb/WindowsPrivilegeEscalation>. PSIRT then reported it to the Perl security team. the chain of gossip is unmatched fr fr.

Perl for Windows relies on the system path environment variable to find the shell (cmd.exe). When running an executable which uses the Windows Perl interpreter, Perl attempts to find and execute cmd.exe within the operating system. However, due to path search order issues, Perl initially looks for cmd.exe in the current working directory. 👀

An attacker with limited privileges can exploit this behavior by placing cmd.exe in locations with weak permissions, such as C:\ProgramData. By doing so, when an administrator attempts to use this executable from these compromised locations, arbitrary code can be executed. 💀 that is Not It.

🫶 Acknowledgements 🫶

Perl 5.36.3 represents approximately 1 month of development since Perl 5.36.1 and contains approximately 2,300 lines of changes across 38 files from 4 authors. obsessed with the efficiency ngl.

Excluding auto-generated files, documentation and release tools, there were approximately 1,400 lines of changes to 8 .pm, .t, .c and .h files. the way that's so specific and so real.

Perl continues to flourish into its fourth decade thanks to a vibrant community of users and developers. 🌈✨ The following people are known to have contributed the improvements that became Perl 5.36.3:

  • Karl Williamson
  • Paul Evans
  • Steve Hay
  • Tony Cook

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. we love you, anonymous bug reporters 🥺

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. 🦋 CPAN besties you ate.

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://github.com/Perl/perl5/issues>. There may also be information at <http://www.perl.org/>, the Perl Home Page. 🏠

If you believe you have an unreported bug, please open an issue at <https://github.com/Perl/perl5/issues>. Be sure to trim your bug down to a tiny but sufficient test case. tiny. sufficient. that's the vibe check. ✂️

If the bug you're reporting has security implications which make it inappropriate to send to a public issue tracker, 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. 🥹 go on, they deserve it.

👀 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.

and that's the whole page bestie!! 💅 this was perl version v5.42.3, dated 2026-08-03, and honestly? she served. go forth and upgrade responsibly, ily 🎀🦋💖

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