CVE-2026-4176

CRITICAL

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

Title source: cna

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.

References (7)

[Mailing List] http://www.openwall.com/lists/oss-security/2026/03/30/2

[Vendor Advisory] https://www.cve.org/CVERecord?id=CVE-2026-3381

[Vendor Advisory] https://lists.security.metacpan.org/cve-announce/msg/37638919/

[Patch] https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94

View Patch ZIP pw:eip

[Release Notes] 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

Scores

CVSS v3 9.8

EPSS 0.0003

EPSS Percentile 7.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-1395

Status published

Products (4)

perl/perl 5.9.4 - 5.40.4

SHAY/perl 5.41.0 - 5.42.2-RC1

SHAY/perl 5.43.0 - 5.43.9

SHAY/perl 5.9.4 - 5.40.4-RC1

Published Mar 29, 2026

Tracked Since Mar 30, 2026