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CVE-2026-3381

31
FAUCET Score

CVE-2026-3381 affects Compress::Raw::Zlib versions through 2.219 for Perl, which bundle potentially insecure versions of the zlib library, specifically those prior to zlib 1.3.2. This vulnerability is rated as Critical (CVSS 9.8), indicating a severe risk with a network attack vector, low attack complexity, and high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 2.219CPE match
cpe:2.3:a:pmqs:compress\:\:raw\:\:zlib:*:*:*:*:*:perl:*:*
<= 2.219CPE matchmatch criteria
cpe:2.3:a:pmqs:compress\:\:raw\:\:zlib:*:*:*:*:*:perl:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 22nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: 18109-17084Fixed in: 1.3.2-1
microsoftpatch availablevia msrc
Product: azl3 zlib 1.3.1-1 on Azure Linux 3.0Fixed in: 1.3.2-1

Vendor Advisories (1)

microsoft2026-Mar/CVE-2026-3381Critical

Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib

Mar 10, 2026

References

7asecurity.com / blog/2026/02/zlib-7asecurity-audit
Third Party Advisory
github.com / madler/zlib
Product
github.com / madler/zlib/releases/tag/v1.3.2
Release Notes
github.com / pmqs/Compress-Raw-Zlib/issues/41
Issue Tracking
metacpan.org / release/PMQS/Compress-Raw-Zlib-2.221/source/Changes
ProductRelease Notes
cve.org / CVERecord
Third Party Advisory
zlib.net
Product