PT-2026-28638 · Cpan+1 · Compress::Raw::Zlib+1

Bernhard Schmalhofer · Published 2026-03-29 · Updated 2026-03-31 · CVE-2026-4176

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Perl versions 5.9.4 through 5.40.4-RC1 Perl versions 5.41.0 through 5.42.2-RC1 Perl versions 5.43.0 through 5.43.9

Description Perl includes a vulnerable version of Compress::Raw::Zlib. The issue is related to the Compress::Raw::Zlib module.

Recommendations Upgrade Perl to a version after 5.40.4-RC1. Upgrade Perl to a version after 5.42.2-RC1. Upgrade Perl to a version after 5.43.9. Install Compress::Raw::Zlib 2.220 or later from CPAN.

Fix

Weakness Enumeration

CWE-1395

Related Identifiers

CVE-2026-4176

Affected Products

Compress::Raw::Zlib

Perl

References · 23

• https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94 · Patch
• https://lists.security.metacpan.org/cve-announce/msg/37638919 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-4176 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-4176 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-3381 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4176 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4176 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-4176 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4176 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-4176 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4176 · Security Note
• https://twitter.com/CVEnew/status/2038516976428126288 · Twitter Post
• https://twitter.com/CosmicBytez/status/2038658376050303125 · Twitter Post
• https://twitter.com/TheHackerWire/status/2038652117192524045 · Twitter Post
• https://security.alpinelinux.org/vuln/CVE-2026-4176 · Note