CVE-2026-4176 | 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 c75ae9cc164205e1b
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.
- 🔗 www.cve.org/CVERecord
- 🔗 lists.security.metacpan.org/cve-announce/msg/37638919/
- 🔗 github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd…
- 🔗 metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/sour…
- 🔗 metacpan.org/release/SHAY/perl-5.40.4/changes
- 🔗 metacpan.org/release/SHAY/perl-5.42.2/changes
- 🔗 www.openwall.com/lists/oss-security/2026/03/30/2
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