CVE-2026-4176 - Vulnerability Analysis

Overview

Perl 5.9.4 < versions < 5.40.4-RC1, 5.41.0 < versions < 5.42.2-RC1, and 5.43.0 < versions < 5.43.9 contain a vulnerability in Compress::Raw::Zlib due to a vendored zlib with multiple vulnerabilities, letting attackers exploit zlib flaws, exploit requires crafted input.

Severity & Score

Impact

Attackers can exploit zlib vulnerabilities to cause potential denial of service or code execution.

Mitigation

Update to Perl version including Compress::Raw::Zlib 2.221 or later.

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

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 30, 2026

🔴 CVE-2026-4176 - Critical (9.8) 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 vulne... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-4176/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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