CVE-2026-4176

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

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.

Scores

Weaknesses (CWE)

• CWE-1395

European references

• ENISA EUVD · EUVD-2026-17044
• GCVE · GCVE-0-2026-4176

CERT-FR advisories

• CERTFR-2026-AVI-0933 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* ≥ 5.9.4 < 5.40.4
• cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* ≥ 5.41.0 < 5.42.2
• cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* ≥ 5.43.0 < 5.43.9

Affected products

References

• https://www.cve.org/CVERecord?id=CVE-2026-3381
• https://lists.security.metacpan.org/cve-announce/msg/37638919/
• https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94
• 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
• http://www.openwall.com/lists/oss-security/2026/03/30/2

Sources