Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib

Description

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

Affected Products

References

• https://www.cve.org/CVERecord?id=CVE-2026-3381(vendor-advisory, related, vdb-entry)
• https://lists.security.metacpan.org/cve-announce/msg/37638919/(vendor-advisory)
• https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94(patch)
• https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes(release-notes)
• https://metacpan.org/release/SHAY/perl-5.40.4/changes(release-notes)
• https://metacpan.org/release/SHAY/perl-5.42.2/changes(release-notes)

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