CVE-2026-3381: Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib. Compress::Raw:

Q: How do I fix CVE-2026-3381?

compress\: upgrade to newer than 2.219. Exact commands for each OS are on this page.

Q: Is CVE-2026-3381 being exploited?

CVE-2026-3381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3381 affect?

CVE-2026-3381 affects compress\. Severity is critical (CVSS 9.8). Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib. Compress::Raw::Zlib includes a copy of the zlib library. Compress::Raw::Zlib version 2.220 includes zlib 1.3.2, which addresses findings fron th

Q: How urgent is CVE-2026-3381?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-3381 is a critical-severity flaw (CVSS 9.8) affecting compress\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib. Compress::Raw::Zlib includes a copy of the zlib library. Compress::Raw::Zlib version 2.220 includes zlib 1.3.2, which addresses findings fron the 7ASecurity audit of zlib. The includes fixs for CVE-2026-27171.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-1284
Published	2026-03-05
Last modified	2026-06-17

Publisher (CNA): CPANSec · Vendor: pmqs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-05 02:16 UTCPublished CVE record published
2026-06-17 10:43 UTCUpdated Record last modified

pmqs compress\ UPGRADE

Affected: <= 2.219

Fixed in: newer than 2.219

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy compress || rpm -q compress || compress --version

2. UPGRADE to newer than 2.219 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade compress

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade compress

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3381?

compress\: upgrade to newer than 2.219. Exact commands for each OS are on this page.

Is CVE-2026-3381 being exploited?

CVE-2026-3381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3381 affect?

CVE-2026-3381 affects compress\. Severity is critical (CVSS 9.8). Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib. Compress::Raw::Zlib includes a copy of the zlib library. Compress::Raw::Zlib version 2.220 includes zlib 1.3.2, which addresses findings fron th

How urgent is CVE-2026-3381?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities · zlib vulnerabilities

References

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