CVE-2026-4176
Published:March 29, 2026
Updated:April 09, 2026
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 Packages
https://github.com/Perl/perl5.git (GITHUB):
Affected version(s) >=v5.42.0 <v5.42.2Fix Suggestion:
Update to version v5.42.2https://github.com/Perl/perl5.git (GITHUB):
Affected version(s) >=v5.40.0 <v5.40.4Fix Suggestion:
Update to version v5.40.4https://github.com/Perl/perl5.git (GITHUB):
Affected version(s) >=v5.43.0 <v5.43.9Fix Suggestion:
Update to version v5.43.9Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Dependency on Vulnerable Third-Party Component
EPSS
Base Score:
0.03
