# CVE-2026-4176

## Summary

- **CVE ID:** CVE-2026-4176
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-1395
- **Published:** Mar 29, 2026
- **Last Modified:** Mar 30, 2026

## 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.

## Affected Products

- SHAY — perl (5.9.4)
- SHAY — perl (5.41.0)
- SHAY — perl (5.43.0)

## References

- [CNA](https://www.cve.org/CVERecord?id=CVE-2026-3381)
- [CNA](https://lists.security.metacpan.org/cve-announce/msg/37638919/)
- [CNA](https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94)
- [CNA](https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes)
- [CNA](https://metacpan.org/release/SHAY/perl-5.40.4/changes)
- [CNA](https://metacpan.org/release/SHAY/perl-5.42.2/changes)
- [CVE](http://www.openwall.com/lists/oss-security/2026/03/30/2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.73%
- **EPSS Percentile:** 52.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._