CVE-2026-3381: Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib
Vulnerability summary
CVE-2026-3381 is a critical (CVSS 9.8) vulnerability in pmqs compress::raw::zlib. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.8% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 05-03-2026PublishedVulnerability first disclosed.
- 11-03-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
Decrease -0.17 pp
From 0.79% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-1395Dependency on Vulnerable Third-Party ComponentThe product has a dependency on a third-party component that contains one or more known vulnerabilities.
- CWE-1284Improper Validation of Specified Quantity in InputThe product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Opensuse2 products
- perl-Compress-Raw-Zlib&distro=openSUSE Leap 16.0< 2.222-bp160.1.1
- perl-Compress-Raw-Zlib&distro=openSUSE Tumbleweed< 2.222-1.1
Alpine1 product
- perl-compress-raw-zlib< 2.222-r0
Debian1 product
- libcompress-raw-zlib-perl< 2.011-2
Pmqs1 product
- compress::raw::zlib≤ 2.219
Ubuntu1 product
- libcompress-raw-zlib-perlAll versions (No fix recorded)
5 vendors · 6 products
References
13 links- github.com/pmqs/Compress-Raw-Zlib/issues/41Issue Tracking
