Insecure zlib Library in Compress::Raw::Zlib Affects Perl Applications
CVE-2026-3381

9.8CRITICAL

Key Information:

Vendor

PMQs

Status
Compress::raw::zlib
Vendor
CVE Published:
5 March 2026

What is CVE-2026-3381?

Compress::Raw::Zlib versions prior to 2.220 include potentially insecure versions of the zlib library, which could expose Perl applications to security vulnerabilities. The subsequent version 2.220 integrates zlib 1.3.2, which addresses issues uncovered in security audits, including critical fixes from the ongoing 7ASecurity assessment. Users are encouraged to upgrade promptly to ensure their applications are protected against associated risks.

Affected Version(s)

Compress::Raw::Zlib 0 <= 2.219

References

https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221...
release-notes
https://www.zlib.net/
https://github.com/madler/zlib

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.