CVE-2026-4176

EUVD-2026-17044
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 7%
Affected Products (NVD)
VendorProductVersion
perlperl
5.9.4 ≤
𝑥
< 5.40.4
perlperl
5.41.0 ≤
𝑥
< 5.42.2
perlperl
5.43.0 ≤
𝑥
< 5.43.9
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
perl
bookworm
5.36.0-7+deb12u3
fixed
bookworm (security)
5.36.0-7+deb12u2
fixed
bullseye
5.32.1-4+deb11u3
fixed
bullseye (security)
5.32.1-4+deb11u5
fixed
forky
5.40.1-7
fixed
sid
5.40.1-7
fixed
trixie
5.40.1-6
fixed
References
https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94
https://lists.security.metacpan.org/cve-announce/msg/37638919/
https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes
https://metacpan.org/release/SHAY/perl-5.40.4/changes
https://metacpan.org/release/SHAY/perl-5.42.2/changes
https://www.cve.org/CVERecord?id=CVE-2026-3381
http://www.openwall.com/lists/oss-security/2026/03/30/2