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.
INFO
Published Date :
March 29, 2026, 9:16 p.m.
Last Modified :
March 30, 2026, 4:16 p.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Perl to a version after 5.40.4-RC1.
- Update Perl to a version after 5.42.2-RC1.
- Update Perl to a version after 5.43.9.
- Ensure Compress::Raw::Zlib is version 2.221 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4176.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4176 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4176
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4176 vulnerability anywhere in the article.
-
Daily CyberSecurity
Joomla! Issues Security Patch: Critical File Deletion and Webservice Flaws Exposed
Joomla! CMS has released a series of critical security updates to address two high-severity vulnerabilities—CVE-2026-23898 and CVE-2026-23899—both carrying a CVSSv4 score of 8.6. These flaws strike at ... Read more
-
Daily CyberSecurity
Critical Vulnerability in Perl Core Modules Leaves Systems Exposed
A high-severity security flaw has been identified within the core of the Perl programming language. Designated as CVE-2026-4176, the vulnerability carries a CVSS score of 9.8, highlighting a critical ... Read more
The following table lists the changes that have been made to the
CVE-2026-4176 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Mar. 30, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/03/30/2 -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Mar. 29, 2026
Action Type Old Value New Value Added 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. Added Reference https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94 Added Reference https://lists.security.metacpan.org/cve-announce/msg/37638919/ Added Reference https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes Added Reference https://metacpan.org/release/SHAY/perl-5.40.4/changes Added Reference https://metacpan.org/release/SHAY/perl-5.42.2/changes Added Reference https://www.cve.org/CVERecord?id=CVE-2026-3381