CVE-2026-4176 Details
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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-4176
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.03 Probability of exploitation activity being observed over the next 30 days (8th percentile)
CVSS score for CVE-2026-4176
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2026-4176
Perl 5.10.0
Perl 5.10.1
Perl 5.12.1
Perl 5.12.2
Perl 5.12.3
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-4176 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 21,049 29.72%
DE 7,350 10.38%
GB 6,564 9.27%
JP 5,146 7.27%
FR 3,554 5.02%
CN 3,394 4.79%
RU 2,266 3.20%
CA 1,975 2.79%
CZ 1,505 2.12%
ID 1,168 1.65%

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CVE-2026-4176 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 33,600 71.40%
Telecommunications 8,093 17.20%
Education 3,578 7.60%
Government/Politics 512 1.09%
Utilities 288 0.61%
Business Services 232 0.49%
Food Production 218 0.46%
Nonprofit/NGO 65 0.14%
Healthcare/Wellness 62 0.13%
Finance 62 0.13%

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