Critical severity9.8NVD Advisory· Published Mar 29, 2026· Updated Apr 22, 2026
CVE-2026-4176
CVE-2026-4176
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*range: >=5.9.4,<5.40.4
- (no CPE)range: >=5.9.4 <5.40.4-RC1, >=5.41.0 <5.42.2-RC1, >=5.43.0 <5.43.9
- Range: <2.221
- osv-coords4 versions
< 5.42.2-r0+ 3 more
- (no CPE)range: < 5.42.2-r0
- (no CPE)range: < 5.42.2-r0
- (no CPE)range: < 5.42.2-r0
- (no CPE)range: < 5.42.2-r0
Patches
Vulnerability mechanics
References
7- github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94nvdPatch
- www.openwall.com/lists/oss-security/2026/03/30/2nvdMailing ListThird Party Advisory
- lists.security.metacpan.org/cve-announce/msg/37638919/nvdThird Party Advisory
- www.cve.org/CVERecordnvdThird Party Advisory
- metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/ChangesnvdRelease Notes
- metacpan.org/release/SHAY/perl-5.40.4/changesnvdRelease Notes
- metacpan.org/release/SHAY/perl-5.42.2/changesnvdRelease Notes
News mentions
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