PERL5363DELTA(1perl)

🎀 NAME 🎀

perl5363delta — bestie, it's literally what is new for perl v5.36.3 💖

✨ DESCRIPTION ✨

Okay so this doc spills the tea on the differences between the 5.36.1 release and the 5.36.3 release. No cap.

🚨 Real talk though: this document ignores Perl 5.36.2, which was a broken release that only existed for a couple of days. We don't talk about 5.36.2. It's not invited to the group chat. 💀

If you're upgrading from an earlier release like 5.36.0, do yourself a favor and read perl5361delta first — it describes the differences between 5.36.0 and 5.36.1. Gotta catch up on the lore before the new episode, iykyk. 🦋

🔒 Security 🔒

This release fixes the following security issues. Not the cute kind of drama. The actual kind. 😭

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. 🫶

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 is not it. That's the opposite of it. 💅

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 <https://github.com/ycdxsb/WindowsPrivilegeEscalation>. PSIRT then reported it to the Perl security team. Chain of custody, but make it security. ✨

Perl for Windows relies on the system path environment variable to find the shell (cmd.exe). When running an executable which uses 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. 🙈 Not the vibe.

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. Miss me with that fr fr. 😭

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💖 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. Look at them go. 👑

Excluding auto-generated files, documentation and release tools, there were approximately 1,400 lines of changes to 8 .pm, .t, .c and .h files. Slay.

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.

Icons. Every single one. 🌈

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. If that's you — thank you, you're the main character. 🫶

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.

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🐛 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. Go peek. 👀

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 — like, a minimal reprex, not your entire 4000-line codebase, bestie. 🙏

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. Keep that one on the down-low. 🤫

🌸 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. Imagine the serotonin they get from that inbox. 🥹✨

👑 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.

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And that's the whole thing, bestie 🎀 — this was PERL5363DELTA(1perl) from the Perl Programmers Reference Guide, served to you with love. It's from perl v5.44.0, dated 2026-10-17. Periodt. 💅💖